Triple-quoted strings are incorrectly indented in _ren.py files

[eevee]

This:

"""renpy
init python:
"""

a = """foo
bar"""

is transformed into this:

init python:
    a = """foo
    bar"""

which changes the contents of a.

Took me a while to realize where the extra space was coming from. That said, this doesn't look pleasant to fix, either.

[Gouvernathor]

That's how it is intended and documented to behave.

[renpytom]

Sure, but it's also kinda bad - and wasn't intended. I need to think about if a fix is possible.

[Gouvernathor]

That wouldn't be easy.
You need to flag the lines that are between opening triple quotes (exclusive) and closing triple quotes (inclusive) ; where no quote is protected by backslash ; not included in a string of the other type of quote (double vs single) ; and that aren't in a comment.

[renpytom]

Yes, but we do this in other parts of Ren'Py's parser, so we could do it here.

[eevee]

It's actually even more not-easy — you can escape newlines in single-quoted strings, so the line after that shouldn't be indented either. And f-strings can contain arbitrary Python expressions, including the same quotes again, as of 3.12.

I suspect it could still be done without the full Python parser, with a Sufficiently Clever™ regex, but it may not be worth it.