Fix: Generating invalid stub if description ends with a quote

[Andrej730]

Was trying to regenerate stubs after https://projects.blender.org/blender/blender/issues/141853 and stumbled upon the SyntaxError when ruff was trying to format the stub.

It occurred with https://docs.blender.org/api/current/bpy.types.BooleanModifier.html#bpy.types.BooleanModifier.debug_options attribute because it ends with ' and 4 single quotes in Python is illegal:

class BooleanModifier:
    debug_options: int
    ''' Debugging options, only when started with '-d''''

# ''' Debugging options, only when started with '-d''''
#                                                         ^
# SyntaxError: unterminated string literal (detected at line 4)

Arguably, #381 can be resolved and then this attribute will have an argument type and then this issue wouldn't occur. But this change still can be kept to make it more safe.