additional changes to avoid array subscript double expansion in arithmetic contexts

tests/array.right

@@ -493,7 +493,7 @@ declare -a a=([1]="2" [2]="3" [3]="4")
 abcd
 unset
 ./array21.sub: line 30: typeset: a: not found
-./array21.sub: line 33: typeset: A: not found
+declare -A A=([four]="4" [two]="2" [three]="3" [one]="1" )
 declare -a a=()
 declare -A A=()
 declare -a foo=([0]="1" [1]="(4 5 6)" [2]="3")

tests/quotearray.right

@@ -79,7 +79,6 @@ declare -A a=()
 declare -A a=(["\$(echo foo)"]="1" )
 declare -A a=()
 declare -A a=(["\$(echo foo)"]="1" )
-./quotearray3.sub: line 66: typeset: assoc: not found
-1
-./quotearray3.sub: line 71: \@: syntax error: operand expected (error token is "\@")
+declare -A assoc=(["!"]="bang" )
+0
 1

tests/quotearray3.sub

@@ -62,9 +62,11 @@ key=@
 assoc[@]=at
 assoc[!]=bang
 
+# this should only unset the element with key `@'
 unset -v assoc[$key]
 typeset -p assoc
 
+# this doesn't work yet
 test -v assoc[$key]
 echo $?