docs(tutorial): text following a node requires a dot

Author: petebacondarwin

public/docs/dart/latest/tutorial/toh-pt3.jade

@@ -62,7 +62,7 @@ code-example(language="bash").
 
     All of our component names end in "Component".  All of our component file names end in "_component".
 
-    We spell our filenames in lower **underscore case** 
+    We spell our filenames in lower **underscore case**
     (AKA **[snake_case](../guide/glossary.html#!#snake_case)**) so we don't worry about
     case sensitivity on the server or in source control.
 
@@ -164,7 +164,7 @@ code-example(format=".").
 :marked
  The two components won't coordinate until we bind the `selectedHero` property of the `AppComponent`
  to the `HeroDetailComponent` element's `hero` property  like this:
-code-example(format=".")
+code-example(format=".").
   <my-hero-detail [hero]="selectedHero"></my-hero-detail>
 :marked
   The `AppComponent`’s template should now look like this