docs(toh/dart): a few small tweaks

closes #1080

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

@@ -62,7 +62,7 @@ code-example(format="." language="bash").
 
     All of our component names end in "Component".  All of our component file names end in "_component".
 
-    We spell our file names in lower dash case (AKA "kebab-case") so we don't worry about
+    We spell our filenames in lower underscore case (AKA "snake_case") so we don't worry about
     case sensitivity on the server or in source control.
 
     <!-- TODO
@@ -135,12 +135,12 @@ code-example(format=".").
     *source* properties do not.
 :marked
   There are a couple of ways we can declare that `hero` is an *input*.
-  We'll do it the way we *prefer*, by annotating the `hero` property with the `@Input` decorator.
+  We'll do it the way we *prefer*, by annotating the `hero` property with `@Input()`.
 +makeExample('toh-3/dart/lib/hero_detail_component.dart', 'inputs')(format=".")
 
 .l-sub-section
   :marked
-    Learn more about the `@Input()` annotation way in the
+    Learn more about `@Input()` in the
     [Attribute Directives](../guide/attribute-directives.html#input) chapter.
 
 .l-main-section