improve the parse_corners_file function

[yakir12]

I applied your suggestions for the parse_corners_file function (readline and single character quotation) in the corner detection file as well.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 18.75%. Comparing base (2506aac) to head (6a7fe2c).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #55   +/-   ##
=======================================
  Coverage   18.75%   18.75%           
=======================================
  Files           3        3           
  Lines          32       32           
=======================================
  Hits            6        6           
  Misses         26       26           

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[ViralBShah]

@yakir12 If you have some bandwidth to help maintain this package, I can give you commit access.

[yakir12]

If it will help relief some pressure then I'll gladly accept.

[ViralBShah]

Sent you an invite