Update commands syntax in README.md template

Author: miltador

packages/angular-cli/blueprints/ng2/files/README.md

@@ -11,7 +11,7 @@ Run `ng generate component component-name` to generate a new component. You can
 
 ## Build
 
-Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `-prod` flag for a production build.
+Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `--prod` flag for a production build.
 
 ## Running unit tests
 
@@ -28,4 +28,4 @@ Run `ng github-pages:deploy` to deploy to Github Pages.
 
 ## Further help
 
-To get more help on the `angular-cli` use `ng --help` or go check out the [Angular-CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
+To get more help on the `angular-cli` use `ng help` or go check out the [Angular-CLI README](https://github.com/angular/angular-cli/blob/master/README.md).