doc: be consistent and remove noise

[CarlJi]

No description provided.

[codecov]

Codecov Report

Merging #47 into master will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
- Coverage   51.04%   51.01%   -0.04%     
==========================================
  Files          31       31              
  Lines        1579     1578       -1     
==========================================
- Hits          806      805       -1     
  Misses        654      654              
  Partials      119      119              

Impacted Files	Coverage Δ
cmd/build.go	52.63% <ø> (ø)
cmd/commonflags.go	100.00% <ø> (ø)
cmd/install.go	50.00% <ø> (ø)
cmd/run.go	11.11% <ø> (ø)
pkg/github/github.go	73.86% <100.00%> (ø)

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[qiniu-bot]

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This pull-request has been approved by: CarlJi

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