silexphp/Silex — pull request #1034 by henrikbjorn (2014-10-07 09:16:49+00:00)
Title: Change closures to use $app as the first parameter.

Almost always the first parameter is $app therefor it makes little sense
to use `use` part of the closure and having PHP do context switching all
over the place.

This also makes it explicit in the service providers exactly what $app
instance is used.