Simpler interdiff-color-context test

[twaugh]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.59%. Comparing base (91aebaf) to head (6a23bf4).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   82.59%   82.59%           
=======================================
  Files           5        5           
  Lines        4130     4130           
  Branches      984      984           
=======================================
  Hits         3411     3411           
  Misses        719      719           

Flag	Coverage Δ
unittests	82.59% <ø> (ø)

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