PHP-CS-Fixer: phpdoc_short_description should not add a comma to inheritdoc

When a phpdoc description is only made by {@inheritdoc}, the phpdoc_short_description fixer should not add a final comma. With the current behavior, the final phpdoc description is {@inheritdoc}. (with final comma), while it should stay untouched, since the final comma is added to the description of parent (that is supposed to already have a final comma), ending with a double final comma.