fix(Help): fixing the help command

Author: sumitarora

packages/@angular/cli/commands/help.ts

@@ -56,7 +56,11 @@ const HelpCommand = Command.extend({
 
       if (rawArgs.length > 0) {
         if (cmd === rawArgs[0]) {
-          this.ui.writeLine(command.printDetailedHelp(commandOptions));
+          if (command.printDetailedHelp) {
+            this.ui.writeLine(command.printDetailedHelp(commandOptions));
+          } else {
+            this.ui.writeLine(command.printBasicHelp(commandOptions));
+          }
         }
       } else {
         this.ui.writeLine(command.printBasicHelp(commandOptions));

packages/@angular/cli/ember-cli/lib/models/command.js

@@ -430,7 +430,7 @@ Command.prototype.printBasicHelp = function() {
 
   @method printDetailedHelp
 */
-Command.prototype.printDetailedHelp = function() {};
+// Command.prototype.printDetailedHelp = function() {};
 
 Command.prototype.getJson = function(options) {
   var json = {};