description clarification, grammar correction

[Evidlo]

Please make sure my description of a Condition is correct.

[codecov-io]

Codecov Report

Merging #196 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##             master    #196   +/-   ##
========================================
  Coverage      10.4%   10.4%           
  Complexity      401     401           
========================================
  Files           390     390           
  Lines         11013   11013           
  Branches       1236    1236           
========================================
  Hits           1146    1146           
  Misses         9633    9633           
  Partials        234     234

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[renyuneyun]

Hi there, Thank you for the work, and apologize for the delay. Some bits of this seem to clash with #190 , as both of you edited something in common. I'll wait until #190 merged (if not taking too long) and manually resolve the conflict. Anyway, thanks a lot!