Fix block ignore not applied when multiple comments present

[JohnnyMorganz]

Fixes #421

[codecov]

Codecov Report

Merging #422 (5a9d2b3) into master (30c713b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #422   +/-   ##
=======================================
  Coverage   96.42%   96.42%           
=======================================
  Files          14       14           
  Lines        5118     5121    +3     
=======================================
+ Hits         4935     4938    +3     
  Misses        183      183           

Impacted Files	Coverage Δ
src/context.rs	93.51% <100.00%> (+0.18%)	⬆️

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