1	#### Lower Case with , and ,,
2	x='ABC DEF'
3	echo ${x,}
4	echo ${x,,}
5	## STDOUT:
6	aBC DEF
7	abc def
8	## END
9
10	#### Upper Case with ^ and ^^
11	x='abc def'
12	echo ${x^}
13	echo ${x^^}
14	## STDOUT:
15	Abc def
16	ABC DEF
17	## END
18
19	#### Lower Case with constant string (VERY WEIRD)
20	x='AAA ABC DEF'
21	echo ${x,A}
22	echo ${x,,A} # replaces every A only?
23	## STDOUT:
24	aAA ABC DEF
25	aaa aBC DEF
26	## END
27
28	#### Lower Case glob
29	x='ABC DEF'
30	echo ${x,[d-f]}
31	echo ${x,,[d-f]} # This seems buggy, it doesn't include F?
32	## STDOUT:
33	ABC DEF
34	ABC deF
35	## END
36
37	#### ${x@Q}
38	x="FOO'BAR spam\"eggs"
39	eval "new=${x@Q}"
40	test "$x" = "$new" && echo OK
41	## STDOUT:
42	OK
43	## END
44
45	#### ${!prefix@} ${!prefix*} yields sorted array of var names
46	ZOO=zoo
47	ZIP=zip
48	ZOOM='one two'
49	Z='three four'
50
51	z=lower
52
53	argv.py ${!Z*}
54	argv.py ${!Z@}
55	argv.py "${!Z*}"
56	argv.py "${!Z@}"
57	## STDOUT:
58	['Z', 'ZIP', 'ZOO', 'ZOOM']
59	['Z', 'ZIP', 'ZOO', 'ZOOM']
60	['Z ZIP ZOO ZOOM']
61	['Z', 'ZIP', 'ZOO', 'ZOOM']
62	## END
63