Minor tweaks to improve code readability

[bkoelman]

QUALITY CHECKLIST

• Changes implemented in code
• Complies with our contributing guidelines
• Adapted tests
• N/A: Documentation updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.78%. Comparing base (df19355) to head (5e900ff).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1723   +/-   ##
=======================================
  Coverage   90.78%   90.78%           
=======================================
  Files         467      467           
  Lines       14613    14615    +2     
  Branches     2302     2302           
=======================================
+ Hits        13266    13268    +2     
  Misses        917      917           
  Partials      430      430           

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