docs(guide/compiler): fix some minor language errors

docs/content/guide/compiler.ngdoc

@@ -6,21 +6,21 @@
 
 Angular's {@link api/ng.$compile HTML compiler} allows the developer to teach the
 browser new HTML syntax. The compiler allows you to attach behavior to any HTML element or attribute
-and even create new HTML element or attributes with custom behavior. Angular calls these behavior
+and even create new HTML elements or attributes with custom behavior. Angular calls these behavior
 extensions {@link api/ng.$compileProvider#directive directives}.
 
 HTML has a lot of constructs for formatting the HTML for static documents in a declarative fashion.
 For example if something needs to be centered, there is no need to provide instructions to the
-browser how the window size needs to be divided in half so that center is found, and that this
+browser how the window size needs to be divided in half so that the center is found, and that this
-center needs to be aligned with the text's center. Simply add `align="center"` attribute to any
+center needs to be aligned with the text's center. Simply add an `align="center"` attribute to any
 element to achieve the desired behavior. Such is the power of declarative language.
 
 But the declarative language is also limited, since it does not allow you to teach the browser new
 syntax. For example there is no easy way to get the browser to align the text at 1/3 the position
-instead of 1/2. What is needed is a way to teach browser new HTML syntax.
+instead of 1/2. What is needed is a way to teach the browser new HTML syntax.
 
 Angular comes pre-bundled with common directives which are useful for building any app. We also
-expect that you will create directives that are specific to your app. These extension become a
+expect that you will create directives that are specific to your app. These extensions become a
 Domain Specific Language for building your application.
 
 All of this compilation takes place in the web browser; no server side or pre-compilation step is
@@ -39,17 +39,16 @@ process happens in two phases.
   scope model are reflected in the view, and any user interactions with the view are reflected
   in the scope model. This makes the scope model the single source of truth.
 
-Some directives such {@link api/ng.directive:ngRepeat
+Some directives such as {@link api/ng.directive:ngRepeat `ng-repeat`} clone DOM elements once
-`ng-repeat`} clone DOM elements once for each item in collection. Having a compile and link phase
+for each item in a collection. Having a compile and link phase improves performance since the
-improves performance since the cloned template only needs to be compiled once, and then linked
+cloned template only needs to be compiled once, and then linked once for each clone instance.
-once for each clone instance.
 
 
 # Directive
 
-A directive is a behavior which should be triggered when specific HTML constructs are encountered in
+A directive is a behavior which should be triggered when specific HTML constructs are encountered
-the compilation process. The directives can be placed in element names, attributes, class names, as
+during the compilation process. The directives can be placed in element names, attributes, class
-well as comments. Here are some equivalent examples of invoking the {@link
+names, as well as comments. Here are some equivalent examples of invoking the {@link
 api/ng.directive:ngBind `ng-bind`} directive.
 
 <pre>