[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

feedparser/mixin.py

@@ -646,7 +646,7 @@ def pop(self, element, strip_whitespace=1):
                         previous_output.append(output)
                         self.entries[-1][element] = previous_output
                     else:
-                      self.entries[-1][element] = output
+                        self.entries[-1][element] = output
                 if self.incontent:
                     contentparams = copy.deepcopy(self.contentparams)
                     contentparams["value"] = output