doc: fix underline length for config title (
issue5949)
This was an error in the initial commit.
Thanks go to Marcel Svitalský for reporting the bug.
--- a/mercurial/help/config.txt Mon Jul 30 15:36:04 2018 +0200
+++ b/mercurial/help/config.txt Tue Jul 31 10:55:14 2018 +0200
@@ -1774,7 +1774,7 @@
Alias definitions for revsets. See :hg:`help revsets` for details.
``storage``
-----------
+-----------
Control the strategy Mercurial uses internally to store history. Options in this
category impact performance and repository size.