mercurial 2.3.1

Closes Homebrew/homebrew#14885.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/mercurial.rb

@@ -2,8 +2,8 @@ require 'formula'
 
 class Mercurial < Formula
   homepage 'http://mercurial.selenic.com/'
-  url 'http://mercurial.selenic.com/release/mercurial-2.3.tar.gz'
-  sha1 'f5fb472500deb01677f1b2e82c7872fe06069cdb'
+  url 'http://mercurial.selenic.com/release/mercurial-2.3.1.tar.gz'
+  sha1 '59e42fd0aebabe8ec9bd59ca6a41416032f7ca48'
 
   head 'http://selenic.com/repo/hg', :using => :hg