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, 1 insertions, 1 deletions

diff --git a/date_test.go b/date_test.go
index 38898b0..2addc4a 100644
--- a/date_test.go
+++ b/date_test.go
@@ -85,5 +85,5 @@ func TestExcelDateToTime(t *testing.T) {
 	}
 	// Check error case
 	_, err := ExcelDateToTime(-1, false)
-	assert.EqualError(t, err, "invalid date value -1.000000, negative values are not supported supported")
+	assert.EqualError(t, err, "invalid date value -1.000000, negative values are not supported")
 }