wrong function and attribute name used
@ -118,7 +118,7 @@ var defaultRender = md.renderer.rules.image,
md.renderer.rules.image = function (tokens, idx, options, env, self) {
var token = tokens[idx],
aIndex = token.attrIdx('href');
aIndex = token.attrIndex('src');
if (vimeoRE.test(token.attrs[aIndex][1])) {