tidy gstr files

[huangqian1985]

No description provided.

[codecov-commenter]

Codecov Report

Merging #1527 (739490c) into master (aabc1f8) will decrease coverage by 0.00%.
The diff coverage is 87.91%.

@@            Coverage Diff             @@
##           master    #1527      +/-   ##
==========================================
- Coverage   70.17%   70.17%   -0.01%     
==========================================
  Files         434      438       +4     
  Lines       42020    42020              
==========================================
- Hits        29488    29486       -2     
- Misses      10655    10659       +4     
+ Partials     1877     1875       -2     

Flag	Coverage Δ
go-1.15	70.10% <87.91%> (-0.07%)	⬇️
go-1.16	70.14% <87.91%> (?)
go-1.17	70.13% <87.91%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
text/gstr/gstr_split_join.go	81.25% <81.25%> (ø)
text/gstr/gstr_convert.go	82.82% <82.05%> (-17.18%)	⬇️
text/gstr/gstr_similar.go	85.71% <85.71%> (ø)
text/gstr/gstr_compare.go	100.00% <100.00%> (ø)
text/gstr/gstr_count.go	100.00% <100.00%> (ø)
text/gstr/gstr_create.go	100.00% <100.00%> (ø)
text/gstr/gstr_is.go	100.00% <100.00%> (ø)
text/gstr/gstr_length.go	100.00% <100.00%> (ø)
text/gstr/gstr_slashes.go	100.00% <100.00%> (ø)
text/gstr/gstr_sub.go	94.64% <100.00%> (ø)
... and 6 more

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