75 grid lines

[jmbarbone]

related to #75

[JanMarvin]

Codecov Report

Merging #149 (d42abe7) into main (f8350ab) will increase coverage by 0.13%.
The diff coverage is 84.61%.

❗ Current head d42abe7 differs from pull request most recent head a64ebe2. Consider uploading reports for the commit a64ebe2 to get more accurate results

@@            Coverage Diff             @@
##             main     #149      +/-   ##
==========================================
+ Coverage   73.06%   73.20%   +0.13%     
==========================================
  Files          37       37              
  Lines        7270     7273       +3     
==========================================
+ Hits         5312     5324      +12     
+ Misses       1958     1949       -9     

Impacted Files	Coverage Δ
R/class-workbook.R	69.80% <83.33%> (+0.08%)	⬆️
R/class-workbook-wrappers.R	47.71% <100.00%> (+1.56%)	⬆️

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