fix: removed unnecessary line skip

[jdickerson95]

Is there any reason for this extra line skip?
It prevents being able to read star files that don't have an empty line between the data_ and loop_ lines (e.g. relion mtf star files)

[alisterburt]

Good catch! If it doesn't break anything else let's get this merged - have approved the CI run and will check back tomorrow

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.73%. Comparing base (5b19406) to head (658b0e8).
Report is 19 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
+ Coverage   80.93%   82.73%   +1.80%     
==========================================
  Files           7        7              
  Lines         278      307      +29     
==========================================
+ Hits          225      254      +29     
  Misses         53       53              

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