gh-89973: Fix re.error in the fnmatch module. (GH-93072) Character ranges with upper bound less that lower bound (e.g. [c-a]) are now interpreted as empty ranges, for compatibility with other glob pattern implementations. Previously it was re.error. (cherry picked from commit 0902c3d8edf7ef67972dd95f6a21670f5d1a4251) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>