fabpot/Twig — comment on commit 89a1519e0931318a0182cd9b7f0920cfcac44274
File:  line 0
By Seldaek:

And to be completely honest, I would have expected filters to be the same as functions. Stylistically they have different uses, but as it is I don't quite see what defines what should be a function and what should be a filter.