fabpot/Twig — comment on commit 1d6dfad4f55c721ec7b6e674ef225b8442bce896
File:  line 0
By fabpot:

In Twig 1.5, `debug` is actually a function as it outputs something. `flush` is different as it does not output anything, it is just a marker to tell PHP to flush the output, so a tag is what we need here.