minor #6013 [2.7][Form] placeholder option: replace "in favor" misuses (ogizanagi)

This PR was merged into the 2.7 branch.

Discussion
----------

[2.7][Form] placeholder option: replace "in favor" misuses

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.7+
| Fixed tickets | -

Commits
-------

7e5b7f1 [Form] placeholder option: replace "in favor" misuses

Author: xabbuh

cookbook/form/create_custom_field_type.rst

@@ -257,7 +257,7 @@ the gender codes were stored in configuration or in a database? The next
 section explains how more complex field types solve this problem.
 
 .. versionadded:: 2.6
-    The ``placeholder`` option was introduced in Symfony 2.6 in favor of
+    The ``placeholder`` option was introduced in Symfony 2.6 and replaces
     ``empty_value``, which is available prior to 2.6.
 
 .. _form-cookbook-form-field-service:

cookbook/form/dynamic_form_modification.rst

@@ -501,7 +501,7 @@ sport like this::
     }
 
 .. versionadded:: 2.6
-    The ``placeholder`` option was introduced in Symfony 2.6 in favor of
+    The ``placeholder`` option was introduced in Symfony 2.6 and replaces
     ``empty_value``, which is available prior to 2.6.
 
 When you're building this form to display to the user for the first time,

reference/forms/types/date.rst

@@ -85,7 +85,7 @@ placeholder
 ~~~~~~~~~~~
 
 .. versionadded:: 2.6
-    The ``placeholder`` option was introduced in Symfony 2.6 in favor of
+    The ``placeholder`` option was introduced in Symfony 2.6 and replaces
     ``empty_value``, which is available prior to 2.6.
 
 **type**: ``string`` or ``array``

reference/forms/types/options/placeholder.rst.inc

@@ -2,7 +2,7 @@ placeholder
 ~~~~~~~~~~~
 
 .. versionadded:: 2.6
-    The ``placeholder`` option was introduced in Symfony 2.6 in favor of
+    The ``placeholder`` option was introduced in Symfony 2.6 and replaces
     ``empty_value``, which is available prior to 2.6.
 
 .. versionadded:: 2.3