'on\nzap\noffon\nping\noff\n'
testing 'getdelim with nested [:blah:]' 'sed -n "sa\a[a[:space:]bc]*aXXagp"' \
"ABXXCDXXEFXXGHXXIXX" "" "ABaaCDa EFaa aGHa a Ia "
+testing '[ in [[]' "sed 's@[[]@X@g'" "X" "" "["
+testing '[[] with ] as delimiter' "sed 's][[]]X]g'" "X" "" "["
+testing '[[] with [ as delimiter' "sed 's[\[\[][X['" "X" "" "["
# gGhHlnNpPqrstwxy:=
# s///#comment