grahom.gi test coverage

[mtorpey]

Nothing too controversial here, but this brings test coverage of grahom to 100%.

In case anyone's wondering: yes, this is more fun than marking.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.45%. Comparing base (7ba3ec4) to head (cf3c0d0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #928      +/-   ##
==========================================
+ Coverage   97.43%   97.45%   +0.02%     
==========================================
  Files          50       50              
  Lines       21193    21188       -5     
  Branches      639      639              
==========================================
  Hits        20649    20649              
+ Misses        479      474       -5     
  Partials       65       65              

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[mtorpey]

@james-d-mitchell – changed that error message back, hopefully all okay now.

[mtorpey]

And fixed.

Curiously, this was caused by the error message wrapping over the word <src> so that the > was the first character on the second line. This means that the expected output in the .tst file was treated as run-on input and caused a syntax warning, even though it was generated by rewriteToFile!