[minor] Space after last element on assoc print

[Quentin L'Hours]

Hi,

Bash Version: 4.4
Release Status: release
Description:

Useless space after last item of a declare -p on an assoc array (indexed 
arrays don't print it, and neither does ksh typeset on assoc arrays).
It doesn't seem to have any consequence though.

Repeat-By:

$ declare -A capital[fr]=Paris
$ declare -p capital
declare -A capital=([fr]="Paris" )

Fix:

Maybe just rlen-- just after looping on all elements in assoc.c

--
Quentin L'Hours