tweaks thank to Javier

Author: weaverryan

frontend/encore/simple-example.rst

@@ -68,6 +68,9 @@ To build the assets, run the following if you use the Yarn package manager:
     # compile assets and automatically re-compile when files change
     $ yarn watch
 
+    # if using npm, use "npm run" and then any of these commands
+    $ npm run watch
+
     # or, run a dev-server that can sometimes update your code without refreshing the page
     $ yarn dev-server
 
@@ -98,7 +101,7 @@ Congrats! You now have three new files:
     that helps performance, but doesn't affect how things work. Others help Encore
     do its work.
 
-Next, to include these in your base layout, you can leverage two zTwig helpers from
+Next, to include these in your base layout, you can leverage two Twig helpers from
 WebpackEncoreBundle:
 
 .. code-block:: html+twig