#65 fn: N, PERCENTILE.INC and T

typo fixed

56 files changed, 177 insertions, 96 deletions

diff --git a/adjust.go b/adjust.go
index c391cb1..3694fb6 100644
--- a/adjust.go
+++ b/adjust.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/calc.go b/calc.go
index 698c51d..1610f5e 100644
--- a/calc.go
+++ b/calc.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
@@ -323,6 +323,7 @@ var tokenPriority = map[string]int{
 //    MROUND
 //    MULTINOMIAL
 //    MUNIT
+//    N
 //    NA
 //    NORM.DIST
 //    NORMDIST
@@ -339,6 +340,7 @@ var tokenPriority = map[string]int{
 //    OCT2HEX
 //    ODD
 //    OR
+//    PERCENTILE.INC
 //    PERCENTILE
 //    PERMUT
 //    PERMUTATIONA
@@ -380,6 +382,7 @@ var tokenPriority = map[string]int{
 //    SUM
 //    SUMIF
 //    SUMSQ
+//    T
 //    TAN
 //    TANH
 //    TODAY
@@ -4521,6 +4524,19 @@ func (fn *formulaFuncs) min(mina bool, argsList *list.List) formulaArg {
 	return newNumberFormulaArg(min)
 }
 
+// PERCENTILEdotINC function returns the k'th percentile (i.e. the value below
+// which k% of the data values fall) for a supplied range of values and a
+// supplied k. The syntax of the function is:
+//
+//    PERCENTILE.INC(array,k)
+//
+func (fn *formulaFuncs) PERCENTILEdotINC(argsList *list.List) formulaArg {
+	if argsList.Len() != 2 {
+		return newErrorFormulaArg(formulaErrorVALUE, "PERCENTILE.INC requires 2 arguments")
+	}
+	return fn.PERCENTILE(argsList)
+}
+
 // PERCENTILE function returns the k'th percentile (i.e. the value below which
 // k% of the data values fall) for a supplied range of values and a supplied
 // k. The syntax of the function is:
@@ -4858,6 +4874,28 @@ func (fn *formulaFuncs) ISTEXT(argsList *list.List) formulaArg {
 	return newBoolFormulaArg(token.Type == ArgString)
 }
 
+// N function converts data into a numeric value. The syntax of the function
+// is:
+//
+//    N(value)
+//
+func (fn *formulaFuncs) N(argsList *list.List) formulaArg {
+	if argsList.Len() != 1 {
+		return newErrorFormulaArg(formulaErrorVALUE, "N requires 1 argument")
+	}
+	token, num := argsList.Front().Value.(formulaArg), 0.0
+	if token.Type == ArgError {
+		return token
+	}
+	if arg := token.ToNumber(); arg.Type == ArgNumber {
+		num = arg.Number
+	}
+	if token.Value() == "TRUE" {
+		num = 1
+	}
+	return newNumberFormulaArg(num)
+}
+
 // NA function returns the Excel #N/A error. This error message has the
 // meaning 'value not available' and is produced when an Excel Formula is
 // unable to find a value that it needs. The syntax of the function is:
@@ -4883,6 +4921,26 @@ func (fn *formulaFuncs) SHEET(argsList *list.List) formulaArg {
 	return newNumberFormulaArg(float64(fn.f.GetSheetIndex(fn.sheet) + 1))
 }
 
+// T function tests if a supplied value is text and if so, returns the
+// supplied text; Otherwise, the function returns an empty text string. The
+// syntax of the function is:
+//
+//    T(value)
+//
+func (fn *formulaFuncs) T(argsList *list.List) formulaArg {
+	if argsList.Len() != 1 {
+		return newErrorFormulaArg(formulaErrorVALUE, "T requires 1 argument")
+	}
+	token := argsList.Front().Value.(formulaArg)
+	if token.Type == ArgError {
+		return token
+	}
+	if token.Type == ArgNumber {
+		return newStringFormulaArg("")
+	}
+	return newStringFormulaArg(token.Value())
+}
+
 // Logical Functions
 
 // AND function tests a number of supplied conditions and returns TRUE or
diff --git a/calc_test.go b/calc_test.go
index 1253ae0..935b3c2 100644
--- a/calc_test.go
+++ b/calc_test.go
@@ -680,6 +680,8 @@ func TestCalcCellValue(t *testing.T) {
 		"=MINA(MUNIT(2))":    "0",
 		"=MINA(INT(1))":      "1",
 		"=MINA(A1:B4,MUNIT(1),INT(0),1,E1:F2,\"\")": "0",
+		// PERCENTILE.INC
+		"=PERCENTILE.INC(A1:A4,0.2)": "0.6",
 		// PERCENTILE
 		"=PERCENTILE(A1:A4,0.2)": "0.6",
 		"=PERCENTILE(0,0)":       "0",
@@ -730,8 +732,17 @@ func TestCalcCellValue(t *testing.T) {
 		// ISTEXT
 		"=ISTEXT(D1)": "TRUE",
 		"=ISTEXT(A1)": "FALSE",
+		// N
+		"=N(10)":     "10",
+		"=N(\"10\")": "10",
+		"=N(\"x\")":  "0",
+		"=N(TRUE)":   "1",
+		"=N(FALSE)":  "0",
 		// SHEET
-		"SHEET()": "1",
+		"=SHEET()": "1",
+		// T
+		"=T(\"text\")": "text",
+		"=T(N(10))":    "",
 		// Logical Functions
 		// AND
 		"=AND(0)":               "FALSE",
@@ -1479,6 +1490,8 @@ func TestCalcCellValue(t *testing.T) {
 		// MINA
 		"=MINA()":     "MINA requires at least 1 argument",
 		"=MINA(NA())": "#N/A",
+		// PERCENTILE.INC
+		"=PERCENTILE.INC()": "PERCENTILE.INC requires 2 arguments",
 		// PERCENTILE
 		"=PERCENTILE()":       "PERCENTILE requires 2 arguments",
 		"=PERCENTILE(0,\"\")": "strconv.ParseFloat: parsing \"\": invalid syntax",
@@ -1525,11 +1538,17 @@ func TestCalcCellValue(t *testing.T) {
 		`=ISODD("text")`: "strconv.Atoi: parsing \"text\": invalid syntax",
 		// ISTEXT
 		"=ISTEXT()": "ISTEXT requires 1 argument",
+		// N
+		"=N()":     "N requires 1 argument",
+		"=N(NA())": "#N/A",
 		// NA
 		"=NA()":  "#N/A",
 		"=NA(1)": "NA accepts no arguments",
 		// SHEET
 		"=SHEET(1)": "SHEET accepts no arguments",
+		// T
+		"=T()":     "T requires 1 argument",
+		"=T(NA())": "#N/A",
 		// Logical Functions
 		// AND
 		`=AND("text")`: "strconv.ParseFloat: parsing \"text\": invalid syntax",
diff --git a/calcchain.go b/calcchain.go
index 0350507..fdc4d3e 100644
--- a/calcchain.go
+++ b/calcchain.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/cell.go b/cell.go
index 2567f19..fd8772f 100644
--- a/cell.go
+++ b/cell.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/chart.go b/chart.go
index 6b7053e..d22cdb0 100644
--- a/chart.go
+++ b/chart.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/col.go b/col.go
index ab95a0b..40ef45f 100644
--- a/col.go
+++ b/col.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/comment.go b/comment.go
index c897943..7e6d31f 100644
--- a/comment.go
+++ b/comment.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/comment_test.go b/comment_test.go
index 955d4e8..80ed0d0 100644
--- a/comment_test.go
+++ b/comment_test.go
@@ -1,4 +1,4 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
diff --git a/crypt_test.go b/crypt_test.go
index 6f712c1..2e35001 100644
--- a/crypt_test.go
+++ b/crypt_test.go
@@ -1,4 +1,4 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
diff --git a/datavalidation.go b/datavalidation.go
index 4cfb125..7d7de0a 100644
--- a/datavalidation.go
+++ b/datavalidation.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/datavalidation_test.go b/datavalidation_test.go
index d70b874..758267d 100644
--- a/datavalidation_test.go
+++ b/datavalidation_test.go
@@ -1,4 +1,4 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
diff --git a/date.go b/date.go
index 34c8989..702f9fe 100644
--- a/date.go
+++ b/date.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/docProps.go b/docProps.go
index 03604c9..f110cd8 100644
--- a/docProps.go
+++ b/docProps.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/docProps_test.go b/docProps_test.go
index ef930ae..071e7ef 100644
--- a/docProps_test.go
+++ b/docProps_test.go
@@ -1,11 +1,13 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
-// and read from XLSX files. Support reads and writes XLSX file generated by
-// Microsoft Excel™ 2007 and later. Support save file without losing original
-// charts of XLSX. This library needs Go version 1.10 or later.
+// and read from XLSX / XLSM / XLTM files. Supports reading and writing
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
+// complex components by high compatibility, and provided streaming API for
+// generating or reading data from a worksheet with huge amounts of data. This
+// library needs Go version 1.10 or later.
 
 package excelize
 
@@ -43,7 +45,7 @@ func TestSetDocProps(t *testing.T) {
 	f.XLSX["docProps/core.xml"] = nil
 	assert.NoError(t, f.SetDocProps(&DocProperties{}))
 
-	// Test unsupport charset
+	// Test unsupported charset
 	f = NewFile()
 	f.XLSX["docProps/core.xml"] = MacintoshCyrillicCharset
 	assert.EqualError(t, f.SetDocProps(&DocProperties{}), "xml decode error: XML syntax error on line 1: invalid UTF-8")
@@ -61,7 +63,7 @@ func TestGetDocProps(t *testing.T) {
 	_, err = f.GetDocProps()
 	assert.NoError(t, err)
 
-	// Test unsupport charset
+	// Test unsupported charset
 	f = NewFile()
 	f.XLSX["docProps/core.xml"] = MacintoshCyrillicCharset
 	_, err = f.GetDocProps()
diff --git a/drawing.go b/drawing.go
index 632b914..9ee0b07 100644
--- a/drawing.go
+++ b/drawing.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/drawing_test.go b/drawing_test.go
index 0a380ed..3c01705 100644
--- a/drawing_test.go
+++ b/drawing_test.go
@@ -1,11 +1,13 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
-// and read from XLSX files. Support reads and writes XLSX file generated by
-// Microsoft Excel™ 2007 and later. Support save file without losing original
-// charts of XLSX. This library needs Go version 1.10 or later.
+// and read from XLSX / XLSM / XLTM files. Supports reading and writing
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
+// complex components by high compatibility, and provided streaming API for
+// generating or reading data from a worksheet with huge amounts of data. This
+// library needs Go version 1.10 or later.
 
 package excelize
 
@@ -22,6 +24,6 @@ func TestDrawingParser(t *testing.T) {
 	}
 	// Test with one cell anchor
 	f.drawingParser("wsDr")
-	// Test with unsupport charset
+	// Test with unsupported charset
 	f.drawingParser("charset")
 }
diff --git a/errors.go b/errors.go
index a31c93a..62b1312 100644
--- a/errors.go
+++ b/errors.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/excelize.go b/excelize.go
index f45dcc0..1d4cf58 100644
--- a/excelize.go
+++ b/excelize.go
@@ -1,4 +1,4 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
diff --git a/excelize_test.go b/excelize_test.go
index 0d0d587..f663ae0 100644
--- a/excelize_test.go
+++ b/excelize_test.go
@@ -1195,7 +1195,7 @@ func TestAddVBAProject(t *testing.T) {
 }
 
 func TestContentTypesReader(t *testing.T) {
-	// Test unsupport charset.
+	// Test unsupported charset.
 	f := NewFile()
 	f.ContentTypes = nil
 	f.XLSX["[Content_Types].xml"] = MacintoshCyrillicCharset
@@ -1203,7 +1203,7 @@ func TestContentTypesReader(t *testing.T) {
 }
 
 func TestWorkbookReader(t *testing.T) {
-	// Test unsupport charset.
+	// Test unsupported charset.
 	f := NewFile()
 	f.WorkBook = nil
 	f.XLSX["xl/workbook.xml"] = MacintoshCyrillicCharset
@@ -1211,7 +1211,7 @@ func TestWorkbookReader(t *testing.T) {
 }
 
 func TestWorkSheetReader(t *testing.T) {
-	// Test unsupport charset.
+	// Test unsupported charset.
 	f := NewFile()
 	delete(f.Sheet, "xl/worksheets/sheet1.xml")
 	f.XLSX["xl/worksheets/sheet1.xml"] = MacintoshCyrillicCharset
@@ -1228,7 +1228,7 @@ func TestWorkSheetReader(t *testing.T) {
 }
 
 func TestRelsReader(t *testing.T) {
-	// Test unsupport charset.
+	// Test unsupported charset.
 	f := NewFile()
 	rels := "xl/_rels/workbook.xml.rels"
 	f.Relationships[rels] = nil
diff --git a/file.go b/file.go
index 582099e..8be71c5 100644
--- a/file.go
+++ b/file.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/lib.go b/lib.go
index 32ef615..10e8c77 100644
--- a/lib.go
+++ b/lib.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/merge.go b/merge.go
index c50eaa3..76ea069 100644
--- a/merge.go
+++ b/merge.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/picture.go b/picture.go
index e46d37e..02f9229 100644
--- a/picture.go
+++ b/picture.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/picture_test.go b/picture_test.go
index 58f7a81..28d8aa8 100644
--- a/picture_test.go
+++ b/picture_test.go
@@ -80,7 +80,7 @@ func TestAddPictureErrors(t *testing.T) {
 		assert.True(t, os.IsNotExist(err), "Expected os.IsNotExist(err) == true")
 	}
 
-	// Test add picture to worksheet with unsupport file type.
+	// Test add picture to worksheet with unsupported file type.
 	err = xlsx.AddPicture("Sheet1", "G21", filepath.Join("test", "Book1.xlsx"), "")
 	assert.EqualError(t, err, "unsupported image extension")
 
diff --git a/pivotTable.go b/pivotTable.go
index 9df8c64..0dae4d1 100644
--- a/pivotTable.go
+++ b/pivotTable.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/rows.go b/rows.go
index 7b4f998..a354e2a 100644
--- a/rows.go
+++ b/rows.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/shape.go b/shape.go
index 2cc72ab..5409a20 100644
--- a/shape.go
+++ b/shape.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/sheet.go b/sheet.go
index 5a9fd46..7b7a946 100644
--- a/sheet.go
+++ b/sheet.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/sheetpr.go b/sheetpr.go
index 52586d9..2ea2394 100644
--- a/sheetpr.go
+++ b/sheetpr.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/sheetview.go b/sheetview.go
index 0a8fd5c..ad216b9 100644
--- a/sheetview.go
+++ b/sheetview.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/sparkline.go b/sparkline.go
index b42207c..bf24843 100644
--- a/sparkline.go
+++ b/sparkline.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/sparkline_test.go b/sparkline_test.go
index 45d3d72..eac9824 100644
--- a/sparkline_test.go
+++ b/sparkline_test.go
@@ -270,7 +270,7 @@ func TestAddSparkline(t *testing.T) {
 }
 
 func TestAppendSparkline(t *testing.T) {
-	// Test unsupport charset.
+	// Test unsupported charset.
 	f := NewFile()
 	ws, err := f.workSheetReader("Sheet1")
 	assert.NoError(t, err)
diff --git a/stream.go b/stream.go
index 7aaf7b4..2500aa8 100644
--- a/stream.go
+++ b/stream.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/stream_test.go b/stream_test.go
index c5febfc..322eea9 100644
--- a/stream_test.go
+++ b/stream_test.go
@@ -94,7 +94,7 @@ func TestStreamWriter(t *testing.T) {
 	assert.NoError(t, streamWriter.rawData.tmp.Close())
 	assert.NoError(t, os.Remove(streamWriter.rawData.tmp.Name()))
 
-	// Test unsupport charset
+	// Test unsupported charset
 	file = NewFile()
 	delete(file.Sheet, "xl/worksheets/sheet1.xml")
 	file.XLSX["xl/worksheets/sheet1.xml"] = MacintoshCyrillicCharset
diff --git a/styles.go b/styles.go
index 9e37239..c2489f2 100644
--- a/styles.go
+++ b/styles.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/styles_test.go b/styles_test.go
index 02a48cc..d3fde0c 100644
--- a/styles_test.go
+++ b/styles_test.go
@@ -259,7 +259,7 @@ func TestSetDefaultFont(t *testing.T) {
 
 func TestStylesReader(t *testing.T) {
 	f := NewFile()
-	// Test read styles with unsupport charset.
+	// Test read styles with unsupported charset.
 	f.Styles = nil
 	f.XLSX["xl/styles.xml"] = MacintoshCyrillicCharset
 	assert.EqualValues(t, new(xlsxStyleSheet), f.stylesReader())
@@ -267,7 +267,7 @@ func TestStylesReader(t *testing.T) {
 
 func TestThemeReader(t *testing.T) {
 	f := NewFile()
-	// Test read theme with unsupport charset.
+	// Test read theme with unsupported charset.
 	f.XLSX["xl/theme/theme1.xml"] = MacintoshCyrillicCharset
 	assert.EqualValues(t, new(xlsxTheme), f.themeReader())
 }
diff --git a/table.go b/table.go
index 8862b57..7b5eaac 100644
--- a/table.go
+++ b/table.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/templates.go b/templates.go
index 5721150..7985282 100644
--- a/templates.go
+++ b/templates.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/vmlDrawing.go b/vmlDrawing.go
index 185df28..5da188a 100644
--- a/vmlDrawing.go
+++ b/vmlDrawing.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlApp.go b/xmlApp.go
index 1d51095..0146c54 100644
--- a/xmlApp.go
+++ b/xmlApp.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlCalcChain.go b/xmlCalcChain.go
index 401bb5e..8af9f5b 100644
--- a/xmlCalcChain.go
+++ b/xmlCalcChain.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlChart.go b/xmlChart.go
index ee2ad29..453b5d8 100644
--- a/xmlChart.go
+++ b/xmlChart.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlComments.go b/xmlComments.go
index f2b03a1..5573ddb 100644
--- a/xmlComments.go
+++ b/xmlComments.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlContentTypes.go b/xmlContentTypes.go
index 458b117..0edbcaf 100644
--- a/xmlContentTypes.go
+++ b/xmlContentTypes.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlCore.go b/xmlCore.go
index 9d7fc45..32cf916 100644
--- a/xmlCore.go
+++ b/xmlCore.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlDecodeDrawing.go b/xmlDecodeDrawing.go
index 8aa22db..9176a99 100644
--- a/xmlDecodeDrawing.go
+++ b/xmlDecodeDrawing.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlDrawing.go b/xmlDrawing.go
index 76d7e17..73291c7 100644
--- a/xmlDrawing.go
+++ b/xmlDrawing.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlPivotCache.go b/xmlPivotCache.go
index 58d977a..4dd42d8 100644
--- a/xmlPivotCache.go
+++ b/xmlPivotCache.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlPivotTable.go b/xmlPivotTable.go
index 9c4be50..e187aba 100644
--- a/xmlPivotTable.go
+++ b/xmlPivotTable.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlSharedStrings.go b/xmlSharedStrings.go
index c9f311b..3c8bc1e 100644
--- a/xmlSharedStrings.go
+++ b/xmlSharedStrings.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlStyles.go b/xmlStyles.go
index 0670b59..08f780e 100644
--- a/xmlStyles.go
+++ b/xmlStyles.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlTable.go b/xmlTable.go
index c48720b..9770e1b 100644
--- a/xmlTable.go
+++ b/xmlTable.go
@@ -4,7 +4,7 @@
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlTheme.go b/xmlTheme.go
index e3588dc..822e1ba 100644
--- a/xmlTheme.go
+++ b/xmlTheme.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlWorkbook.go b/xmlWorkbook.go
index b25165b..dd127f8 100644
--- a/xmlWorkbook.go
+++ b/xmlWorkbook.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.
diff --git a/xmlWorksheet.go b/xmlWorksheet.go
index b31eec1..9079331 100644
--- a/xmlWorksheet.go
+++ b/xmlWorksheet.go
@@ -1,10 +1,10 @@
-// Copyright 2016 - 2020 The excelize Authors. All rights reserved. Use of
+// Copyright 2016 - 2021 The excelize Authors. All rights reserved. Use of
 // this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 //
 // Package excelize providing a set of functions that allow you to write to
 // and read from XLSX / XLSM / XLTM files. Supports reading and writing
-// spreadsheet documents generated by Microsoft Exce™ 2007 and later. Supports
+// spreadsheet documents generated by Microsoft Excel™ 2007 and later. Supports
 // complex components by high compatibility, and provided streaming API for
 // generating or reading data from a worksheet with huge amounts of data. This
 // library needs Go version 1.10 or later.