Fix constraints with open intervals

[odow]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.86%. Comparing base (e7d4459) to head (90abe5a).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
+ Coverage   81.73%   81.86%   +0.12%     
==========================================
  Files           9        9              
  Lines         575      579       +4     
==========================================
+ Hits          470      474       +4     
  Misses        105      105              

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