Cleanup: use autopep8 for bl_i18n_utils.settings

Disable autopep8 for some regex blocks that use indentation
to signify regex grouping.

release/scripts/modules/bl_i18n_utils/settings.py

@@ -192,6 +192,8 @@ PYGETTEXT_CONTEXTS_DEFSRC = os.path.join("source", "blender", "blentranslation",
 # XXX Not full-proof, but should be enough here!
 PYGETTEXT_CONTEXTS = "#define\\s+(BLT_I18NCONTEXT_[A-Z_0-9]+)\\s+\"([^\"]*)\""
 
+# autopep8: off
+
 # Keywords' regex.
 # XXX Most unfortunately, we can't use named backreferences inside character sets,
 #     which makes the regexes even more twisty... :/
@@ -256,6 +258,9 @@ PYGETTEXT_KEYWORDS = (() +
           for it in ("BLT_I18N_MSGID_MULTI_CTXT",))
 )
 
+# autopep8: on
+
+
 # Check printf mismatches between msgid and msgstr.
 CHECK_PRINTF_FORMAT = (
     r"(?!<%)(?:%%)*%"          # Beginning, with handling for crazy things like '%%%%%s'