Merge pull request #541 from unional/patch-2

Update README.md

Author: guybedford

README.md

@@ -59,9 +59,9 @@ The `Loader` and `ModuleNamespace` classes in `core/loader-polyfill.js` provide
 - *`loader.registry.get(resolvedKey)`*: Get a module namespace (if any) from the registry.
 - *`loader.registry.has(resolvedKey)`*: Boolean indicating whether the given key is present in the registry.
 - *`loader.registry.delete(resolvedKey)``*: Removes the given module from the registry (if any), returning true or false.
-- *`loader.registry.keys`*: Function returning the keys iterator for the registry.
-- *`loader.registry.values`*: Function returning the values iterator for the registry.
-- *`loader.registry.entries`*: Function returning the entries iterator for the registry (keys and values).
+- *`loader.registry.keys()`*: Function returning the keys iterator for the registry.
+- *`loader.registry.values()`*: Function returning the values iterator for the registry.
+- *`loader.registry.entries()`*: Function returning the entries iterator for the registry (keys and values).
 - *`loader.registry[Symbol.iterator]`*: In supported environments, provides registry entries iteration.
 
 Example of using the base loader API: