docs(ngmodule): clarity: FormModule is not in imports array (#2195)

Author: wardbell

public/docs/ts/latest/guide/ngmodule.jade

@@ -823,7 +823,7 @@ a#shared-module
   As it happens, the components declared by `SharedModule` itself don't bind with `[(ngModel)]`. 
   Technically,  there is no need for `SharedModule` to import `FormsModule`.
 
-  `SharedModule` can still export `FormsModule` without importing it.
+  `SharedModule` can still export `FormsModule` without listing it among its `imports`.
 
   ### Why _TitleComponent_ isn't shared