Remove unnecessary characters

[sbryngelson]

Closes #609

[codecov]

Codecov Report

Attention: Patch coverage is 74.35897% with 10 lines in your changes missing coverage. Please review.

Project coverage is 43.72%. Comparing base (630695c) to head (7cc5443).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/post_process/m_data_output.fpp	55.00%	9 Missing ⚠️
src/simulation/m_time_steppers.fpp	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #775   +/-   ##
=======================================
  Coverage   43.72%   43.72%           
=======================================
  Files          65       65           
  Lines       19052    19053    +1     
  Branches     2318     2319    +1     
=======================================
+ Hits         8330     8331    +1     
  Misses       9320     9320           
  Partials     1402     1402           

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