Fixes #756 remove empty string when set cell value to nil in Stream W…

[barismar]

PR Details

Not setting empty string when set cell value to nil in Stream Writer

Description

Not setting cell value to c.setCellValue("") (empty string) when setCellValFunc(c *xlsxC, val interface{}) val param accept nil value

Related Issue

#756

Motivation and Context

Excel that generated with Stream Writer can use excel function like ISBLANK(), COUNTA() etc.

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #1481 (64e0f9a) into master (94e86dc) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##           master    #1481      +/-   ##
==========================================
- Coverage   98.69%   98.67%   -0.02%     
==========================================
  Files          31       31              
  Lines       24300    24300              
==========================================
- Hits        23982    23979       -3     
- Misses        210      212       +2     
- Partials      108      109       +1     

Flag	Coverage Δ
unittests	98.67% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
stream.go	93.63% <100.00%> (ø)
cell.go	98.66% <0.00%> (-0.34%)	⬇️

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[xuri]

LGTM, thanks for your contribution. This patch will be released in the next version.