Use verbatim text in config file examples

[kannes]

#51 added extraneous backslashes to config file structure examples which makes them incorrect.

This was required to get inspection tools like pyqt5_to_pyqt6.py to not fail on:

./profile_manager/handlers/expressions.py:6: SyntaxWarning: invalid escape sequence '\e'
./profile_manager/handlers/customization.py:7: SyntaxWarning: invalid escape sequence '\A'

A workaround would be marking the docstrings as raw strings (r""").

@Guts alternatively suggested switching to Sphinx style docstring structure in #51 (comment) although I am actually not sure if that would really change how pyqt5_to_pyqt6.py interprets the strings?

An alternative solution would be to move the examples into separate documentation (once #52 is merged). The docstrings should still clearly say what the functions do, but maybe having the example contents of config files there was not really a good idea in the first place.