[PATCH] Fix bang flag in ${(!)ref::=var} substitutions

[Philippe Altherr <philippe.altherr@xxxxxxxxx>]

The documentation states that with the substitution flag (!) the reference itself is examined, not its referent, but this fails in ${(!)ref::=var} substitutions:

% typeset var=foo
% typeset -n ref=var
% echo ${(!)ref::=bar}
bar
% typeset -p var ref

typeset var=bar
typeset -n ref=var

The result of the last command should be the following:

typeset var=foo
typeset -n ref=bar

- Fix bang flag in ${(!)ref::=var} substitutions

Philippe