#895 - Incorrect formatting of factorial.

[sys27]

Closes #895.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.06%. Comparing base (6519bda) to head (907a419).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #901   +/-   ##
=======================================
  Coverage   99.06%   99.06%           
=======================================
  Files         220      220           
  Lines        8690     8692    +2     
  Branches     1347     1348    +1     
=======================================
+ Hits         8609     8611    +2     
  Misses         31       31           
  Partials       50       50           

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