closes bpo-35643: Fix a SyntaxWarning: invalid escape sequence in Modules/_sha3/cleanup.py (GH-11411)

(cherry picked from commit d466c43e55cd32af84e353f0e9a48b09b7534f61)

Co-authored-by: Mickaƫl Schoentgen <contact@tiger-222.fr>
2 files changed