fix($injector): improve $injector:nomod error message

Closes angular#2695

Author: IgorMinar

src/loader.js

@@ -70,7 +70,9 @@ function setupModuleLoader(window) {
       }
       return ensure(modules, name, function() {
         if (!requires) {
-          throw minErr('$injector')('nomod', "Module '{0}' is not available! You either misspelled the module name or forgot to load it.", name);
+          throw minErr('$injector')('nomod', "Module '{0}' is not available! You either misspelled the module name " +
+              "or forgot to load it. If registering a module ensure that you specify the dependencies as the second " +
+              "argument.", name);
         }
 
         /** @type {!Array.<Array.<*>>} */

test/loaderSpec.js

@@ -68,6 +68,8 @@ describe('module loader', function() {
   it('should complain of no module', function() {
     expect(function() {
       window.angular.module('dontExist');
-    }).toThrow("[$injector:nomod] Module 'dontExist' is not available! You either misspelled the module name or forgot to load it.");
+    }).toThrow("[$injector:nomod] Module 'dontExist' is not available! You either misspelled the module name " +
+            "or forgot to load it. If registering a module ensure that you specify the dependencies as the second " +
+            "argument.");
   });
 });