templatekw: forward _hybrid.get to raw values so that get(extras, key) works...
templatekw: forward _hybrid.get to raw values so that get(extras, key) works
ef78450c8df6 implies that the primary goal is to allow "{get(extras, key)}",
but it didn't work.
I'm not sure if _hybrid should forward all unknown attributes to values, so
only "get" is forwarded for now.