Fix: Folding for comments and different modes

[mkslanc]

Issue #, if available: #5521

Description of changes:

• Fixed missing Array state handling in getCommentFoldRange.
• Corrected comment fold range determination in XML languages (now getFoldRange won't return the next tag after a comment).
• Improved documentation comments regular expression to handle the /**/ case.
• Fixed Lua comment and string folding range.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Pull Request Checklist:

• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.72%. Comparing base (7869158) to head (5b0fa5e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5533      +/-   ##
==========================================
+ Coverage   86.64%   86.72%   +0.08%     
==========================================
  Files         593      594       +1     
  Lines       42839    42876      +37     
  Branches     7120     7120              
==========================================
+ Hits        37117    37186      +69     
+ Misses       5722     5690      -32     

Flag	Coverage Δ
unittests	86.72% <100.00%> (+0.08%)	⬆️

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