Pathname./ because it looks a lot better than +

Library/Homebrew/extend/pathname.rb

@@ -209,6 +209,8 @@ class Pathname
     self.to_s[0, prefix.length] == prefix
   end
 
+  # perhaps confusingly, this Pathname object becomes the symlink pointing to
+  # the src paramter.
   def make_relative_symlink src
     self.dirname.mkpath
     Dir.chdir self.dirname do
@@ -216,13 +218,17 @@ class Pathname
       # NOTE Ruby functions may work, but I had a lot of problems
       rv = system 'ln', '-sf', src.relative_path_from(self.dirname)
       unless rv and $? == 0
-        raise <<-EOS
+        raise <<-EOS.undent
           Could not create symlink #{to_s}.
           Check that you have permssions on #{self.dirname}
           EOS
       end
     end
   end
+
+  def / that
+    join that.to_s
+  end
 end
 
 # sets $n and $d so you can observe creation of stuff