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