[fr] Fix typos and grammar in global-constants-and-functions.rst
[fr] Fix typos and grammar in collections.rst
[fr] Fix typos and grammar in events.rst
[fr] Fix typos and grammar in caching.rst
[fr] Fix typos and grammar in internalization-and-localization.rst
[fr] Fix typos and grammar in logging.rst
[fr] Fix typos in where-to-get-help.rst
[fr] Fix typos in what-is-cakephp-why-use-it.rst
[fr] Fix typos in understanding-model-view-controller.rst
[fr] fix typos in console-and-shells files