[PATCH STABLE] help: fix the display for `hg help internals.revlogs` (issue5227)

[Matt Harbison]

# HG changeset patch
# User Matt Harbison <matt_harbison at yahoo.com>
# Date 1462760889 14400
#      Sun May 08 22:28:09 2016 -0400
# Branch stable
# Node ID 5de7c07043e332681eb96543e12765a6a3cc6fd9
# Parent  ad8cb6d19d53a76f3f23a5a45fe6e82244783fed
help: fix the display for `hg help internals.revlogs` (issue5227)

It previously aborted saying the help section wasn't found.  Credit to Yuya for
figuring out the fix.

diff --git a/mercurial/help/internals/revlogs.txt b/mercurial/help/internals/revlogs.txt
--- a/mercurial/help/internals/revlogs.txt
+++ b/mercurial/help/internals/revlogs.txt
@@ -1,5 +1,5 @@
-Revisions Logs
-==============
+Revlogs
+=======
 
 Revision logs - or *revlogs* - are an append only data structure for
 storing discrete entries, or *revisions*. They are the primary storage