Regex literal lexer is too aggressive

[liamoc]

This gives an unexpected regex error because of the two division signs.

add_bezier_slopes(ground,0,height / 2, width, height * 6 / 10)

[jashkenas]

Thanks. Nice bug. There's a interesting discussion of the issue here:

http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions

Fixed now on master by making the lexer check the previous token before deciding if it's a regex or not. Regexes can't immediately follow identifiers, numbers, or strings. Division signs can only follow identifiers and numbers.

Closing the ticket.