DOC: remove extra *

[Zeroto521]

#217 doesn't merge #215 cause * is still in master branch

[codecov]

Codecov Report

Merging #227 (42c6e1e) into master (354a15f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #227   +/-   ##
=======================================
  Coverage   99.80%   99.80%           
=======================================
  Files          21       21           
  Lines         512      512           
  Branches       51       51           
=======================================
  Hits          511      511           
  Partials        1        1           

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