Completion: Add support for '=' in arguments to __docker_pos_first_nonflag
Completion: Add support for '=' in arguments to __docker_pos_first_nonflag

This solves several problems that arise from the special treatment of
"=" in Bash.
The fix was required as some log drivers have options in a key=value
form. It also addresses the --option=value and the negated boolean syntax
(--boolean=false).

Note that this is not a general fix for these problems, it is limited to
the __docker_pos_first_nonflag function.

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

cpuguy83/cli,ashfall/cli,thaJeztah/cli,dnephin/cli,e11137/cli,redpanda/cli,Zebrilee/cli,docker/cli,ashfall/cli,e11137/cli,allencloud/cli,docker/cli,allencloud/cli,thaJeztah/cli,riyazdf/cli,Zebrilee/cli,redpanda/cli,dnephin/cli,riyazdf/cli,cpuguy83/cli