Update language extensions for empty lists

[kddejong]

Issue #, if available:
fix #3762
Description of changes:

• Update language extensions for empty lists

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[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 93.76%. Comparing base (0d7df03) to head (35dd48c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...fnlint/template/transforms/_language_extensions.py	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3764   +/-   ##
=======================================
  Coverage   93.76%   93.76%           
=======================================
  Files         362      362           
  Lines       12353    12356    +3     
  Branches     2520     2521    +1     
=======================================
+ Hits        11583    11586    +3     
  Misses        429      429           
  Partials      341      341           

Flag	Coverage Δ
unittests	93.72% <80.00%> (+<0.01%)	⬆️

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