[PATCH STABLE] README: make paragraphs before example code end with "::" for reST syntax

[FUJIWARA Katsunori]

# HG changeset patch
# User FUJIWARA Katsunori <foozy at lares.dti.ne.jp>
# Date 1501505273 -32400
#      Mon Jul 31 21:47:53 2017 +0900
# Branch stable
# Node ID fe33ab21105ba2476131c7b078d905a1f2f7efcf
# Parent  92f7dcf9a40b056573be89f611e1f093521696d7
# Available At https://bitbucket.org/foozy/mercurial-wip
#              hg pull https://bitbucket.org/foozy/mercurial-wip -r fe33ab21105b
# EXP-Topic doc-improvement-hg43
README: make paragraphs before example code end with "::" for reST syntax

After this patch, README as reST text can be rendered into HTML more
appropriately. This is useful for hosting servers, which render README
file as a part of index HTML of its directory (for example,
Bitbucket).

diff --git a/README b/README
--- a/README
+++ b/README
@@ -4,14 +4,14 @@ Mercurial
 Mercurial is a fast, easy to use, distributed revision control tool
 for software developers.
 
-Basic install:
+Basic install::
 
  $ make            # see install targets
  $ make install    # do a system-wide install
  $ hg debuginstall # sanity-check setup
  $ hg              # see help
 
-Running without installing:
+Running without installing::
 
  $ make local      # build for inplace usage
  $ ./hg --version  # should show the latest version