# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 2022-03-25 05:05:49
# Node ID eb8aed493a567cf34d4a9f2fba9929b764a76c28
# Parent  db93041e5b1ca454167af6adcea4520da21e80e0

logcmdutil: use new function for getting first line of string

Differential Revision: https://phab.mercurial-scm.org/D12412

diff --git a/mercurial/logcmdutil.py b/mercurial/logcmdutil.py
--- a/mercurial/logcmdutil.py
+++ b/mercurial/logcmdutil.py
@@ -416,7 +416,7 @@ class changesetprinter:
                 self.ui.write(b"\n\n")
             else:
                 self.ui.write(
-                    columns[b'summary'] % description.splitlines()[0],
+                    columns[b'summary'] % stringutil.firstline(description),
                     label=b'log.summary',
                 )
         self.ui.write(b"\n")