Add test for increment operator in return statement

[vaithak]

Closes #687

[vaithak]

#687 was fixed in #690, adding the test here to ensure it doesn't arise in future. If this is not required, we can anyway close #687.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (3a5ad4a) 94.54% compared to head (55718ce) 94.54%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #707   +/-   ##
=======================================
  Coverage   94.54%   94.54%           
=======================================
  Files          49       49           
  Lines        7183     7183           
=======================================
  Hits         6791     6791           
  Misses        392      392           

[vgvassilev]

LGTM!