Rouge may crash when formatting tokens if options are used with lexer instance

[mojavelinux]

Rouge will sometimes crash when formatting tokens that were created using a lexer instance that was used with options.

The problem stems from a typo in the Lexer#lex method. Here's the problematic line:

rouge/lib/rouge/lexer.rb

Lines 421 to 424 in 6d62ba1

	if opts
	warn 'the :continue option to Formatter#lex is deprecated, use #continue_lex instead.'
	return continue_lex(string, &b)
	end

The code is not actually checking for the :continue option, which can send the application down the wrong code path. As a result, very bizarre things start to happen.

[bbatsov]

I was just about report this! 😃 Thanks, @mojavelinux!

[mojavelinux]

Already have a fix too...because I was super curious ;)