docs(angular.module): simplify wording+improve grammar

A suggestion on the wording of retrieving a moudle

Closes #12543

src/loader.js

@@ -38,8 +38,8 @@ function setupModuleLoader(window) {
      * All modules (angular core or 3rd party) that should be available to an application must be
      * registered using this mechanism.
      *
-     * When passed two or more arguments, a new module is created.  If passed only one argument, an
-     * existing module (the name passed as the first argument to `module`) is retrieved.
+     * Passing one argument retrieves an existing {@link angular.Module}, 
+     * whereas passing more than one argument creates a new {@link angular.Module}
      *
      *
      * # Module