Fix name change function

[kneckinator]

The name change function added a whitespace at the end of the string, which caused problems that were not easily spotted by a user.

This fix changes the following:

• Adjusting the name_change function to be more Pythonic, and faster, and make sure there is no trailing space.
• Adjusting the test for the name_change function to cover the possible scenarios of the function.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.68%. Comparing base (2193a08) to head (6ad4a4d).
Report is 1 commits behind head on 17.0-develop.

Additional details and impacted files

@@               Coverage Diff                @@
##           17.0-develop     #210      +/-   ##
================================================
+ Coverage         67.56%   67.68%   +0.12%     
================================================
  Files               166      166              
  Lines              4439     4434       -5     
  Branches            630      540      -90     
================================================
+ Hits               2999     3001       +2     
+ Misses             1346     1345       -1     
+ Partials             94       88       -6     

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