minor #3672 Fix docs about the deprecated tag (fabpot)
minor #3672 Fix docs about the deprecated tag (fabpot)

This PR was submitted for the 3.x branch but it was merged into the 2.x branch instead.

Discussion
----------

Fix docs about the deprecated tag

Closes #3594

Commits
-------

17142af9 Fix docs about the deprecated tag

twigphp/Twig,twigphp/Twig,twigphp/Twig