gpg-connect-agent produces invalid output when using hex encoding.

Example:

nephirus@soridormi:~$ gpg-connect-agent --hex 'scd random 16' /bye
D[0000]  19 FD 22 34 52 77 11 5B  AE 28 EB ED 01 45 99 DB   .."4Rw.[.(...E..
OK

There is no space after 'D'. This is an invalid Assuan message:

Assuan manual, 3.1 Server responses:
... There must be exactly one space after the ’D’. ...

Without '--hex' flag, output is correct:

nephirus@soridormi:~$ gpg-connect-agent 'scd random 16' /bye
D �<������k����9?
OK