cpython

57558307 - [3.12] gh-146333: Fix quadratic regex backtracking in configparser option parsing (GH-146399) (GH-148559) (#154081)

[3.12] gh-146333: Fix quadratic regex backtracking in configparser option parsing (GH-146399) (GH-148559) (#154081) Use negative lookahead in option regex to prevent backtracking, and to avoid changing logic outside the regexes (since people could use the regex directly). (cherry picked from commit 7e0a0be4097f9d29d66fe23f5af86f18a34ed7dd) (cherry picked from commit a5969e8f0fda37aaf0e2f844fdcfca9d822a70b1) Co-authored-by: Joshua Swanson <22283299+joshuaswanson@users.noreply.github.com>