escape html tag

[heiy]

PR Details

support html tag

use html.EscapeString to transform the html tag

Motivation and Context

if excel have html tag , it well be empty

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 #647 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #647   +/-   ##
=======================================
  Coverage   96.45%   96.45%           
=======================================
  Files          30       30           
  Lines        8718     8718           
=======================================
  Hits         8409     8409           
  Misses        189      189           
  Partials      120      120           

Impacted Files	Coverage Δ
cell.go	96.61% <100.00%> (ø)

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[xuri]

LGTM, thanks @heiy.