More generic doc

lib/index.js

@@ -110,7 +110,7 @@ exports.publish = function publish(config, done) {
                 var message = 'Remote url mismatch.  Got "' + url + '" ' +
                     'but expected "' + repoUrl + '" in ' + options.clone +
                     '.  If you have changed your "repo" option, try ' +
-                    'running `grunt gh-pages-clean` first.';
+                    'running the "clean" task first.';
                 return Q.reject(new Error(message));
               } else {
                 return Q.resolve();