Merge pull request cakephp#2587 from jtyost2/patch-1

Adds clarifying language around pluralize and singularize

Author: markstory

en/core-utility-libraries/inflector.rst

@@ -15,11 +15,19 @@ You can try out the inflections online at `inflector.cakephp.org <http://inflect
  * **Input:** Apple, Orange, Person, Man
  * **Output:** Apples, Oranges, People, Men
 
+.. note::
+
+ ``pluralize()`` may not always correctly convert a noun that is already in it's plural form.
+
 .. php:staticmethod:: singularize($plural)
 
  * **Input:** Apples, Oranges, People, Men
  * **Output:** Apple, Orange, Person, Man
 
+.. note::
+
+ ``singularize()`` may not always correctly convert a noun that is already in it's singular form.
+
 .. php:staticmethod:: camelize($underscored)
 
  * **Input:** Apple\_pie, some\_thing, people\_person