Fix the error message

lib/datasource.js

@@ -221,10 +221,9 @@ DataSource._resolveConnector = function (name, loader) {
   var connector = tryModules(names, loader);
   var error = null;
   if (!connector) {
-    error = '\nWARNING: LoopBack connector "' + name
-      + '" is not installed at any of the locations ' + names
-      + '. To fix, run:\n\n    npm install '
-      + name + '\n';
+    error = util.format('\nWARNING: LoopBack connector "%s" is not installed ' +
+      'as any of the following modules:\n\n %s\n\nTo fix, run:\n\n    npm install %s\n',
+      name, names.join('\n'), names[names.length -1]);
   }
   return {
     connector: connector,