CodeMirror mustache support

gistfile1.js

CodeMirror.defineMode("mustache", function (config, parserConfig) {
    var mustacheOverlay = {
        token: function (stream, state) {
	if (stream.match("{{")) {
	    while ((ch = stream.next()) != null)
	    if (ch == "}" && stream.next() == "}") break;
	        return "mustache";
	    }
            while (stream.next() != null && !stream.match("{{", false)) {}
	        return null;
	    }
        };
        return CodeMirror.overlayParser(CodeMirror.getMode(config, parserConfig.backdrop || "text/html"),
        mustacheOverlay);
    });

//Credit unknown :( 

This looks like an older version of the code at https://github.com/marijnh/CodeMirror/blob/master/demo/mustache.html

I'm trying to upgrade some an old CodeMirror code mode and comparing this with the newer version that @peterflynn posted of mustache helped me solve the issue I was having (overlayParser is now overlayMode). Thank you both!