Minor punctuation correction

[pauljurczak]

No description provided.

[codecov]

Codecov Report

Merging #1041 (ecaa65d) into master (ad5bdec) will not change coverage.
The diff coverage is n/a.

❗ Current head ecaa65d differs from pull request most recent head 3a169f9. Consider uploading reports for the commit 3a169f9 to get more accurate results

@@           Coverage Diff           @@
##           master    #1041   +/-   ##
=======================================
  Coverage   96.32%   96.32%           
=======================================
  Files          40       40           
  Lines        9405     9405           
  Branches     1248     1248           
=======================================
  Hits         9059     9059           
  Misses        204      204           
  Partials      142      142           

Impacted Files	Coverage Δ
cadquery/cq.py	92.43% <ø> (ø)

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[jmwright]

Thanks @pauljurczak