$csrfProvider definition is missed

[sensorario]

In this file, $csrfProvider definition is missed: https://github.com/symfony/symfony-docs/blob/master/components/form/introduction.rst

[wouterj]

Thanks for reporting this!

This should be replaced with $csrfManager from the previous section. This was changed in the 2.7 version of the documentation.

[snoek09]

I'm fixing this.