Revision 1912632

Fix `invalid escape sequence` in Python scripts to prevent many
`SyntaxWarning`s since Python 3.12.

* build/generator/gen_win.py
* build/generator/gen_win_dependencies.py
* build/generator/swig/__init__.py
* build/transform_sql.py
* subversion/tests/cmdline/basic_tests.py
* subversion/tests/cmdline/changelist_tests.py
* subversion/tests/cmdline/checkout_tests.py
* subversion/tests/cmdline/copy_tests.py
* subversion/tests/cmdline/diff_tests.py
* subversion/tests/cmdline/getopt_tests.py
* subversion/tests/cmdline/info_tests.py
* subversion/tests/cmdline/legacy/utf8_tests.py
* subversion/tests/cmdline/lock_tests.py
* subversion/tests/cmdline/log_tests.py
* subversion/tests/cmdline/merge_authz_tests.py
* subversion/tests/cmdline/merge_automatic_tests.py
* subversion/tests/cmdline/merge_tests.py
* subversion/tests/cmdline/merge_tree_conflict_tests.py
* subversion/tests/cmdline/patch_tests.py
* subversion/tests/cmdline/prop_tests.py
* subversion/tests/cmdline/special_tests.py
* subversion/tests/cmdline/stat_tests.py
* subversion/tests/cmdline/svnadmin_tests.py
* subversion/tests/cmdline/svnfsfs_tests.py
* subversion/tests/cmdline/svnmover_tests.py
* subversion/tests/cmdline/svnmucc_tests.py
* subversion/tests/cmdline/svntest/actions.py
* subversion/tests/cmdline/svntest/main.py
* subversion/tests/cmdline/svntest/verify.py
* subversion/tests/cmdline/svntest/wc.py
* subversion/tests/cmdline/trans_tests.py
* subversion/tests/cmdline/update_tests.py
* subversion/tests/cmdline/upgrade_tests.py
* subversion/tests/manual/tree-conflicts-add-vs-add.py
* tools/dist/release.py
  Use raw literals or correct escape sequences.

Patch by: jun66j5
Review by: futatuki

Discussed: https://lists.apache.org/thread/m5s9zpj2jvsmtof07c0vvpjlwnwpdwsl