Don't see a good reason to keep these commented

#IfWinNotExist and #IfWinNotActive are still usable and actual in the
fresh .ahk
For consistency with the rest words

p.s.: I know they are not case sensitive, but still…
More WinTitle params

http://l.autohotkey.net/docs/misc/WinTitle.htm
Indent blockinput's modes
Deprecated from AHK 3 years ago
)

Removed in  Revision 54 - August 15, 2010
Remove #region and #endregion from folding rules

That's not AHK syntax, that's C#.
Remove double $[]

$[] stands for "set caret position here", there is only one caret, it
can't be set to two positions simultaneously.