Less indentation

migrate.py

@@ -169,6 +169,7 @@ def _update_moved_handle(base_dir: str, nickname: str, domain: str,
     followers_filename = \
         acct_dir(base_dir, nickname, domain) + '/followers.txt'
     if os.path.isfile(followers_filename):
+        follower_handles = []
         with open(followers_filename, 'r', encoding='utf-8') as foll3:
             follower_handles = foll3.readlines()