Fix golint errors under confidence 0.1

cell.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

chart.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

col.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

comment.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

datavalidation.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (
@@ -128,7 +136,7 @@ func (dd *DataValidation) SetSqrefDropList(sqref string, isCurrentSheet bool) er
 	}
 
 	//isCurrentSheet = false   Cross-sheet sqref cell use extLst xml node  unrealized
-	return fmt.Errorf("Cross-sheet sqref cell  are not supported")
+	return fmt.Errorf("cross-sheet sqref cell are not supported")
 }
 
 // SetSqref provides function to set data validation range in drop list.

datavalidation_test.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

date.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

excelize.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

file.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (
@@ -43,7 +51,7 @@ func NewFile() *File {
 // Save provides a function to override the xlsx file with origin path.
 func (f *File) Save() error {
 	if f.Path == "" {
-		return fmt.Errorf("No path defined for file, consider File.WriteTo or File.Write")
+		return fmt.Errorf("no path defined for file, consider File.WriteTo or File.Write")
 	}
 	return f.SaveAs(f.Path)
 }

hsl.go

@@ -1,33 +1,35 @@
-/*
-Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-	 * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-	 * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-	 * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
+// 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 1.8 or later.
+//
+// Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// 	 * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// 	 * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// 	 * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 package excelize
 
 import (

lib.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

picture.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (
@@ -86,10 +94,10 @@ func (f *File) AddPicture(sheet, cell, picture, format string) error {
 	}
 	ext, ok := supportImageTypes[path.Ext(picture)]
 	if !ok {
-		return errors.New("Unsupported image extension")
+		return errors.New("unsupported image extension")
 	}
 	readFile, err := os.Open(picture)
-	if err!=nil{
+	if err != nil {
 		return err
 	}
 	defer readFile.Close()

rows.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

shape.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (

sheet.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (
@@ -371,7 +379,7 @@ func (f *File) SetSheetBackground(sheet, picture string) error {
 	}
 	ext, ok := supportImageTypes[path.Ext(picture)]
 	if !ok {
-		return errors.New("Unsupported image extension")
+		return errors.New("unsupported image extension")
 	}
 	pictureID := f.countMedia() + 1
 	rID := f.addSheetRelationships(sheet, SourceRelationshipImage, "../media/image"+strconv.Itoa(pictureID)+ext, "")
@@ -441,7 +449,7 @@ func (f *File) deleteSheetFromContentTypes(target string) {
 //
 func (f *File) CopySheet(from, to int) error {
 	if from < 1 || to < 1 || from == to || f.GetSheetName(from) == "" || f.GetSheetName(to) == "" {
-		return errors.New("Invalid worksheet index")
+		return errors.New("invalid worksheet index")
 	}
 	f.copySheet(from, to)
 	return nil

sheetpr.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 // SheetPrOption is an option of a view of a worksheet. See SetSheetPrOptions().

sheetview.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import "fmt"

styles.go

@@ -1,3 +1,11 @@
+// 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 1.8 or later.
+//
+// Copyright 2016 - 2018 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
 
 import (
@@ -798,35 +806,35 @@ var validType = map[string]string{
 
 // criteriaType defined the list of valid criteria types.
 var criteriaType = map[string]string{
-	"between":      "between",
-	"not between":  "notBetween",
-	"equal to":     "equal",
-	"=":            "equal",
-	"==":           "equal",
-	"not equal to": "notEqual",
-	"!=":           "notEqual",
-	"<>":           "notEqual",
-	"greater than": "greaterThan",
-	">":            "greaterThan",
-	"less than":    "lessThan",
-	"<":            "lessThan",
+	"between":                  "between",
+	"not between":              "notBetween",
+	"equal to":                 "equal",
+	"=":                        "equal",
+	"==":                       "equal",
+	"not equal to":             "notEqual",
+	"!=":                       "notEqual",
+	"<>":                       "notEqual",
+	"greater than":             "greaterThan",
+	">":                        "greaterThan",
+	"less than":                "lessThan",
+	"<":                        "lessThan",
 	"greater than or equal to": "greaterThanOrEqual",
-	">=": "greaterThanOrEqual",
-	"less than or equal to": "lessThanOrEqual",
-	"<=":             "lessThanOrEqual",
-	"containing":     "containsText",
-	"not containing": "notContains",
-	"begins with":    "beginsWith",
-	"ends with":      "endsWith",
-	"yesterday":      "yesterday",
-	"today":          "today",
-	"last 7 days":    "last7Days",
-	"last week":      "lastWeek",
-	"this week":      "thisWeek",
-	"continue week":  "continueWeek",
-	"last month":     "lastMonth",
-	"this month":     "thisMonth",
-	"continue month": "continueMonth",
+	">=":                       "greaterThanOrEqual",
+	"less than or equal to":    "lessThanOrEqual",
+	"<=":                       "lessThanOrEqual",
+	"containing":               "containsText",
+	"not containing":           "notContains",
+	"begins with":              "beginsWith",
+	"ends with":                "endsWith",
+	"yesterday":                "yesterday",
+	"today":                    "today",
+	"last 7 days":              "last7Days",
+	"last week":                "lastWeek",
+	"this week":                "thisWeek",
+	"continue week":            "continueWeek",
+	"last month":               "lastMonth",
+	"this month":               "thisMonth",
+	"continue month":           "continueMonth",
 }
 
 // formatToString provides a function to return original string by given