Invalid escape sequences

Your code presents some invalid escape sequences that are considered errors from python 11. Please check: https://docs.astral.sh/ruff/rules/invalid-escape-sequence/
A clear and concise description of the bug.

**Steps To Reproduce**
With CI workflow for analyzing the code, errors like:

E SyntaxError: invalid escape sequence '\?'

rises in the comment lines

**Expected Behavior**
A clear and concise description of what you expected to happen.

**Environment**
- for all the OS
- for python in range 3.9 to 3.12