Regression handling trailers with parenthesis at the end

[GwenTheKween]

The GDB project is looking at consistently using git trailers, and when some patch is acked, we'd like to be able to record on the trailer itself which part was acked or approved, like so:

Acked-by: John Doe <[email protected]> (Documentation)
Acked-by: Jane Smith <[email protected]> (gdbserver)
Approved-by: Jeremy James <[email protected]>

This works fine on my machine, with b4 0.10.2, but someone on the IRC reported that b4 0.12.3 drops the trailing parenthesis. Could this be looked into?