monkey around for emacs' code highlighter

The abv method has a construct that causes emacs to not highlight
the rest of pathname.rb, so move abv lower in the file.

Sorry.

Library/Homebrew/extend/pathname.rb

@@ -173,13 +173,6 @@ class Pathname
     FileUtils.chmod_R perms, to_s
   end
 
-  def abv
-    out=''
-    n=`find #{to_s} -type f ! -name .DS_Store | wc -l`.to_i
-    out<<"#{n} files, " if n > 1
-    out<<`/usr/bin/du -hs #{to_s} | cut -d"\t" -f1`.strip
-  end
-
   def version
     require 'version'
     Version.parse(self)
@@ -429,6 +422,13 @@ class Pathname
     end
   end
 
+  def abv
+    out=''
+    n=`find #{to_s} -type f ! -name .DS_Store | wc -l`.to_i
+    out<<"#{n} files, " if n > 1
+    out<<`/usr/bin/du -hs #{to_s} | cut -d"\t" -f1`.strip
+  end
+
   # We redefine these private methods in order to add the /o modifier to
   # the Regexp literals, which forces string interpolation to happen only
   # once instead of each time the method is called. This is fixed in 1.9+.