Document TimeHelper::nice takes $format as param

As per the [TimeHelper::nice source code](https://github.com/cakephp/cakephp/blob/master/lib/Cake/Utility/CakeTime.php#L349), it can take $format as param. 

So Document that in the book.
Change casing
[ja] applied changes around views.rst
[ja] fixed reST formatting
fixed RequestHandlerComponent::setContent() parameter formatting
[fr] update with 2.2&2.3 fr/models/data-validation.rst
[fr] fr/core-libraries/components/request-handling.rst Follow 142fa0b8c8f9972e87615b995c40c3e257a26160
Merge pull request #540 from cakephp-fr/master

[fr] update fr/core-libraries/components/request-handling.rst and fr/models/data-validation.rst
Fixed commas and typos
Merge pull request #541 from PaulMougel/master

Fixed commas and typos in the french translation
Update saving-your-data.rst

Redundant use of "either"
Merge pull request #542 from spiliot/patch-4

Update saving-your-data.rst
[fr] Follow #542 and fix typos in fr/models/saving-your-data.rst
Merge pull request #543 from cakephp-fr/master

[fr] Follow #542
Update view.rst

Compléments sur l'utilisation des blocks dans les views/layouts.
Merge pull request #545 from TeddyBear06/patch-1

Update view.rst
Update view.rst

Added missing word "be"
Merge pull request #546 from openam/master

Update view.rst
Path to Plugin assets changed in 2.3
[fr] Fix some typos and finish translation of fr/views.rst