ruby-1.9.2-p0 > 2 + sqrt 5
SyntaxError: (irb):25: syntax error, unexpected tINTEGER, expecting
keyword_do or '{' or '('
	from /home/martin/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in `<main>'

I can't see why that doesn't parse properly.

martin