fix: require a space character between flow ending and comment

[tdakkota]

Fixes #58.

[codecov]

Codecov Report

Patch coverage: 93.75% and project coverage change: +0.08 🎉

Comparison is base (1c73787) 77.43% compared to head (58e264a) 77.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   77.43%   77.52%   +0.08%     
==========================================
  Files          22       22              
  Lines        7263     7274      +11     
==========================================
+ Hits         5624     5639      +15     
+ Misses       1264     1261       -3     
+ Partials      375      374       -1     

Impacted Files	Coverage Δ
scannerc.go	80.48% <93.75%> (+0.31%)	⬆️

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