mercurial: use install_symlink

Formula/mercurial.rb

@@ -1,8 +1,8 @@
 require 'formula'
 
 class Mercurial < Formula
-  url 'http://mercurial.selenic.com/release/mercurial-2.1.tar.gz'
   homepage 'http://mercurial.selenic.com/'
+  url 'http://mercurial.selenic.com/release/mercurial-2.1.tar.gz'
   sha1 'f649a0b33e0cafb3e5867a2e970f41eb887d3fab'
   head 'http://selenic.com/repo/hg', :using => :hg
 
@@ -35,13 +35,10 @@ class Mercurial < Formula
     # Now we have lib/python2.x/site-packages/ with Mercurial
     # libs in them. We want to move these out of site-packages into
     # a self-contained folder. Let's choose libexec.
-    bin.mkpath
-    libexec.mkpath
-
     libexec.install Dir["#{lib}/python*/site-packages/*"]
 
     # Symlink the hg binary into bin
-    ln_s libexec+'hg', bin+'hg'
+    bin.install_symlink libexec+'hg'
 
     # Remove the hard-coded python invocation from hg
     inreplace bin+'hg', %r[#!/.*/python/.*], '#!/usr/bin/env python'
@@ -51,7 +48,7 @@ class Mercurial < Formula
 
     # Install man pages
     man1.install 'doc/hg.1'
-    man5.install ['doc/hgignore.5', 'doc/hgrc.5']
+    man5.install 'doc/hgignore.5', 'doc/hgrc.5'
   end
 
   def caveats