fixes label issue

[zorkow]

Labels prefixes for clearspeak were incorrect. Now they work.

Adds tests for labels in different multi-line environments.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.57%. Comparing base (17076f0) to head (58bd602).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #836   +/-   ##
========================================
  Coverage    91.57%   91.57%           
========================================
  Files          165      165           
  Lines        40224    40224           
  Branches      4310     4354   +44     
========================================
  Hits         36837    36837           
  Misses        3387     3387           

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