If you use Rails a lot you get very very used to using symbols as if they were keyword arguments. If you want to do this:
instead of this:
it only requires a tiny change to gems. Go to line 27 of custom_require.rb (the path on a standard OS X box configured with port is /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb) and change this:
It's just syntactic sugar, but it feels more intuitive to me.
Update: I expanded this into a new version of the require method in custom_require.rb which also takes arrays.
Update again: damn it, this breaks sometimes. I don't know why.