TypeScript: parsing function body should not check for templates...

[jafl]

…because < & > are comparison operators.

Fixes #4313

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.87%. Comparing base (e6a4947) to head (87aa0cb).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4314      +/-   ##
==========================================
- Coverage   85.88%   85.87%   -0.01%     
==========================================
  Files         248      248              
  Lines       63602    63602              
==========================================
- Hits        54624    54619       -5     
- Misses       8978     8983       +5     

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