post-post-review updates

Author: chalin

public/docs/dart/latest/guide/dependency-injection.jade

@@ -126,13 +126,11 @@ block dart-map-alternative
     The Dart [cascade notation][cascade] (`..`) provides a convenient means of initializing
     a configuration object. 
 
-    Use of the cascaded initialization idiom
-    prevents us from defining our configuration object instance as `const`. 
-    As a consequence, we cannot declare a [value provider](#value-provider),
-    but a [factory provider](#factory-provider) does the trick.
-
-    We illustrate this below by providing and injecting the configuration object in our
-    top-level `AppComponent`:
+    If we use cascades, the configuration object can't be declared `const` and
+    we can't use a [value provider](#value-provider). 
+    A solution is to use a [factory provider](#factory-provider).
+    We illustrate this next. We also show how to provide and inject the
+    configuration object in our top-level `AppComponent`:
 
     [cascade]: https://www.dartlang.org/docs/dart-up-and-running/ch02.html#cascade