[PATCH 2 of 5 STABLE] doc: prevent literal text block from being treated as non-literal one

[FUJIWARA Katsunori]

# HG changeset patch
# User FUJIWARA Katsunori <foozy at lares.dti.ne.jp>
# Date 1454331995 -32400
#      Mon Feb 01 22:06:35 2016 +0900
# Branch stable
# Node ID 507bc371dcb433e98dd996b253db850c53082223
# Parent  5f5457d48d2c6d0a7cfcff552f12eac0ad8c897a
doc: prevent literal text block from being treated as non-literal one

This creates hg.1.html as expected.

diff --git a/hgext/histedit.py b/hgext/histedit.py
--- a/hgext/histedit.py
+++ b/hgext/histedit.py
@@ -162,7 +162,7 @@ revset in your configuration file::
 
 By default each edited revision needs to be present in histedit commands.
 To remove revision you need to use ``drop`` operation. You can configure
-the drop to be implicit for missing commits by adding:
+the drop to be implicit for missing commits by adding::
 
   [histedit]
   dropmissing = True