Fix typos in contrib

[DimitriPapadopoulos]

No description provided.

[codecov]

Codecov Report

Merging #441 (a32ed28) into master (a891f1c) will not change coverage.
The diff coverage is n/a.

❗ Current head a32ed28 differs from pull request most recent head b26fff4. Consider uploading reports for the commit b26fff4 to get more accurate results

@@           Coverage Diff           @@
##           master     #441   +/-   ##
=======================================
  Coverage   99.29%   99.29%           
=======================================
  Files          12       12           
  Lines        4539     4539           
=======================================
  Hits         4507     4507           
  Misses         32       32           

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