Tab completion of arguments is broken

[xqms]

It seems the "tip" to use syslog broke tab completion:

a:=                file:=             instead:=          --log=syslog:=     or:=               ROSMON_SYSLOG=1:=  set:=              Tip::=             to:=               variable:=         
environment:=      in:=               log:=              of:=               output:=           send:=             syslog:=           /tmp.:=            use:=