./rubypaste.rb -l
/usr/local/lib/ruby/1.8/optparse.rb:451:in `parse': missing argument: -l (OptionParser::MissingArgument)
	from /usr/local/lib/ruby/1.8/optparse.rb:1288:in `parse_in_order'
	from /usr/local/lib/ruby/1.8/optparse.rb:1247:in `catch'
	from /usr/local/lib/ruby/1.8/optparse.rb:1247:in `parse_in_order'
	from /usr/local/lib/ruby/1.8/optparse.rb:1241:in `order!'
	from /usr/local/lib/ruby/1.8/optparse.rb:1332:in `permute!'
	from /usr/local/lib/ruby/1.8/optparse.rb:1353:in `parse!'
	from ./rubypaste.rb:28