docs($compileProvider): improve strictComponentBindingsEnabled info

Related to angular#16303

Author: Narretz

docs/content/error/$compile/missingattr.ngdoc

@@ -3,6 +3,36 @@
 @fullName Missing required attribute
 @description
 
-This error may occur only when `$compileProvider.strictComponentBindingsEnabled` is set to `true`.
-Then all attributes mentioned in `bindings` without `?` must be set. If one or more aren't set,
-the first one will throw an error.
+This error may occur only when {@link $compileProvider#strictComponentBindingsEnabled `$compileProvider.strictComponentBindingsEnabled`} is set to `true`.
+
+If that is the case, then all {@link $compileProvider#component component} controller bindings and
+{@link $compileProvider#directive directive} scope / controller bindings that are non-optional,
+must be included when the directive is used.
+
+To make a binding optional, add '?' to the definition.
+
+### Example:
+
+```js
+
+app.component('myTest', function() {
+  return {
+    bindings: {
+      first: '=?', // this one is optional
+      second: '='
+    },
+    controller: function() {
+      ...
+    },
+    template: '...'
+  }
+});
+
+```
+
+This component will throw `missingattr` when used as follows:
+
+```html
+<myTest></myTest>
+```
+

src/ng/compile.js

@@ -1422,9 +1422,12 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
    * @kind function
    *
    * @description
-   * Call this method to enable/disable strict component bindings check. If enabled, the compiler will enforce that
-   * for all bindings of a component that are not set as optional with `?`, an attribute needs to be provided
-   * on the component's HTML tag.
+   * Call this method to enable / disable the strict component bindings check. If enabled, the
+   * compiler will enforce that for all scope / controller bindings of
+   * a {@link $compileProvider#directive directive} / {$compileProvider#component component}
+   * that are not set as optional with `?`, an attribute needs to be provided on the
+   * component's HTML tag. If not set, the compiler will throw the {@link error/$compile/missingattr
+   * $compile:missingattr error}.
    *
    * The default value is false.
    */