add: default: return text; 
context: 	var text = divs.fold(function(div, text) {			switch(div.getAttribute("class")) {				case "moz-text-plain":				case "moz-text-flowed":					return text + colorediffsGlobal.htmlToPlainText(div.innerHTML);			}		},
meta: 4572	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4572/75d7c7b6d51a4bfb85d53fe7a7c32c21be05e416/colorediffs.js/buggy/content/colorediffs/colorediffs.js