Fix documentation
<style> tag become optional

but yoda-conditions do not create disturbance in the Force ;-)
Update BlockHelper.php

Return of the Jedi.
My bad.
My bad.
Merge pull request #144 from ronanguilloux/patch-1

<style> tag become optional
Typo error : key template is missing
Merge pull request #145 from cbastienbaron/patch-1

Typo error : key template is missing
Merge pull request #143 from Prims47/master

Fix documentation
Merge remote-tracking branch 'sonata-project/master'