changes to several error messages; more test suite additions

tests/array.right

@@ -123,15 +123,17 @@ argv[1] = </>
 55
 49
 6 -- 6
+./array.tests: line 232: [-10]: bad array subscript
+0
 42 14 44
 grep [ 123 ] *
 6 7 9
 6 7 9 5
 length = 3
 value = new1 new2 new3
-./array.tests: line 256: syntax error near unexpected token `&'
-./array.tests: line 256: `badarray=( metacharacters like & need to be quoted in compound assignments)'
-./array.tests: line 260: narray: unbound variable
+./array.tests: line 261: syntax error near unexpected token `&'
+./array.tests: line 261: `badarray=( metacharacters like & need to be quoted in compound assignments)'
+./array.tests: line 265: narray: unbound variable
 ./array1.sub: line 1: syntax error near unexpected token `('
 ./array1.sub: line 1: `printf "%s\n" -a a=(a 'b  c')'
 ./array2.sub: line 1: declare: `[]=asdf': not a valid identifier
@@ -158,10 +160,10 @@ for case if then else
 12 14 16 18 20
 4414758999202
 aaa bbb
-./array.tests: line 310: syntax error near unexpected token `<>'
-./array.tests: line 310: `metas=( <> < > ! )'
-./array.tests: line 311: syntax error near unexpected token `<>'
-./array.tests: line 311: `metas=( [1]=<> [2]=< [3]=> [4]=! )'
+./array.tests: line 315: syntax error near unexpected token `<>'
+./array.tests: line 315: `metas=( <> < > ! )'
+./array.tests: line 316: syntax error near unexpected token `<>'
+./array.tests: line 316: `metas=( [1]=<> [2]=< [3]=> [4]=! )'
 abc 3
 case 4
 abc case if then else 5
@@ -846,3 +848,4 @@ declare -a A=([0]="x" [1]="x")
 declare -a A=([0]="x" [1]="x")
 ./array33.sub: line 46: A: cannot convert indexed to associative array
 declare -a A=([0]="x" [1]="x")
+./array33.sub: line 52: read: A: not an indexed array