Dwarf Fortress: style nit-picks

Formula/dwarf-fortress.rb

@@ -1,23 +1,17 @@
 require 'formula'
 
 class DwarfFortress < Formula
-  url 'http://www.bay12games.com/dwarves/df_34_05_osx.tar.bz2'
   homepage 'http://www.bay12games.com/dwarves/'
-  md5 '470dd5b1f75bdc2f567a10127b3708bf'
+  url 'http://www.bay12games.com/dwarves/df_34_05_osx.tar.bz2'
   version '0.34.05'
-
-  def script; <<-EOS.undent
-    #!/bin/sh
-    # Dwarf Fortress wrapper script
-    exec #{prefix}/df
-    EOS
-  end
+  md5 '470dd5b1f75bdc2f567a10127b3708bf'
 
   def install
-    (bin + 'dwarffortress').write script
-
+    (bin+'dwarffortress').write <<-EOS.undent
+      #!/bin/sh
+      exec #{libexec}/df
+    EOS
     rm_rf 'sdl' # only contains a readme
-
-    prefix.install Dir['*']
+    libexec.install Dir['*']
   end
 end