diff -r bd1483fd7088 -r 7f0cb9ee0534 mercurial/utils/stringutil.py
--- a/mercurial/utils/stringutil.py	Mon Jul 22 16:49:38 2024 +0200
+++ b/mercurial/utils/stringutil.py	Tue Jul 23 10:02:46 2024 +0200
@@ -574,6 +574,7 @@
         return mailmap
 
     for line in mailmapcontent.splitlines():
+
         # Don't bother checking the line if it is a comment or
         # is an improperly formed author field
         if line.lstrip().startswith(b'#'):
@@ -800,6 +801,7 @@
             chunks.reverse()
 
             while chunks:
+
                 # Start the list of chunks that will make up the current line.
                 # cur_len is just the length of all the chunks in cur_line.
                 cur_line = []