.ig
Test whether delimiter in string is processed at higher input level than
surrounding context in:
	.tl 'left'center'right'
If it works, then each part looks like "location'location".
Parsing should fail with compatiblity mode on.
..
.ds l left'left
.ds c center'center
.ds r right'right
.\"
.cp 0
This should work:
.br
.tl '\*l'\*c'\*r'
.br
.cp 1
This should fail:
.br
.tl '\*l'\*c'\*r'
