Improve security and simplify code

- Make variable name more semantic
- Reduce cyclomatic complexities for the formula calculate function
- Support specified unzip size limit on open file options, avoid zip bombs vulnerability attack
- Typo fix for documentation and error message

1 files changed, 5 insertions, 3 deletions

diff --git a/datavalidation_test.go b/datavalidation_test.go
index f0afe5f..0cb5929 100644
--- a/datavalidation_test.go
+++ b/datavalidation_test.go
@@ -3,9 +3,11 @@
 // 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 1.15 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 1.15 or later.
 
 package excelize