Just a readability note...

[the bigg]

You can have variables containing exclusively whitespace. While this is generally a bad idea, it can be used for better readability in REPLACE_TEXTUALLY lines:

 

BEGIN ~asd~
<<<<<<<< asd
Something()
Something				 Else()
>>>>>>>>

INCLUDE ~bg2fixpack/lib/extra_regexp_vars.tph~

COPY ~asd~ ~foo~
 SPRINT ~
~ ~[%tab% %wnl%%lnl%%mnl%]+~
 SPRINT ~ ~ ~[%tab% ]+~

 REPLACE_TEXTUALLY ~Something()%
%Something% %Else()~ ~Something()
SomethingEntirelyDifferent()~

 

will work as intended if all the file is encoded with the same newline notation, but perhaps is more readable than putting hundreds of [%tab% %wnl%%lnl%%mnl%]+ in the code

you may have to define the %space*m newline space*n% variable multiple times with a different number of spaces before and after the newline (before the NL just in case somebody puts a trailing space for error), to account for different indentation level, but that shouldn't be a problem.