Ack formula now installs bash completion script.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/ack.rb

@@ -1,8 +1,19 @@
 require 'formula'
 
-class Ack <ScriptFileFormula
+class AckCompletion < Formula
+  url 'http://github.com/petdance/ack/raw/68120b5d30150e805c033d0458df89a487aa66c5/etc/ack.bash_completion.sh'
+  md5 '22e3f388b4fe2b05841ec46b4e1d61b7'
+  version '1.92'
+end
+
+class Ack < Formula
   url "http://github.com/petdance/ack/raw/079b049b7240c2960a8ff811b2857eba462ad803/ack"
   version '1.92'
   md5 '7db577145ceba9f6cc5fddc3e8198342'
   homepage 'http://betterthangrep.com/'
+
+  def install
+    bin.install Dir['*']
+    AckCompletion.new.brew { (prefix+'etc/bash_completion.d').install Dir['*'] }
+  end
 end