cleanup: pep8

also remove empty class parenthesis

release/scripts/modules/bl_i18n_utils/bl_extract_messages.py

@@ -62,6 +62,7 @@ def _gen_check_ctxt(settings):
         "spell_errors": {},
     }
 
+
 def _diff_check_ctxt(check_ctxt, minus_check_ctxt):
     """Returns check_ctxt - minus_check_ctxt"""
     for key in check_ctxt:
@@ -74,6 +75,7 @@ def _diff_check_ctxt(check_ctxt, minus_check_ctxt):
                 if warning in check_ctxt[key]:
                     del check_ctxt[key][warning]
 
+
 def _gen_reports(check_ctxt):
     return {
         "check_ctxt": check_ctxt,
@@ -473,7 +475,6 @@ def dump_py_messages_from_files(msgs, reports, files, settings):
 
         return [_extract_string_merge(estr_ls, nds_ls) for estr_ls, nds_ls in bag]
 
-
     i18n_ctxt_ids = {v for v in bpy.app.translations.contexts_C_to_py.values()}
     def _ctxt_to_ctxt(node):
         # We must try, to some extend, to get contexts from vars instead of only literal strings...