Allow trailing whitespace in mol and sdf inputs

[awvwgk]

Closes #92

[codecov]

Codecov Report

Attention: Patch coverage is 76.59574% with 11 lines in your changes missing coverage. Please review.

Project coverage is 70.98%. Comparing base (b76b93b) to head (1db5ddf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
test/test_read_ctfile.f90	75.55%	0 Missing and 11 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #94      +/-   ##
==========================================
+ Coverage   70.96%   70.98%   +0.01%     
==========================================
  Files          80       80              
  Lines       11236    11281      +45     
  Branches     3444     3455      +11     
==========================================
+ Hits         7974     8008      +34     
  Misses        759      759              
- Partials     2503     2514      +11     

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