chore: mesgdef clean up code

[muktihari]

• Remove invalid value check on degrees method as kit/semicircles already handle it.
• Clean up mesgdef.tmpl replace four space with one tab (\t)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (be543d0) to head (fb99c84).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #389   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           41        41           
  Lines         3689      3689           
=========================================
  Hits          3689      3689           

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