4.4BSD/usr/src/contrib/bib/macs/beforepunct

.ds [. .
.ds .] " \&
.ds [, ,
.ds ,] " \&
.ds [? ?
.ds ?] " \&
.ds [: :
.ds :] " \&
.ds [; ;
.ds ;] " \&
.ds [! !
.ds !] " \&
.ds [" \&"
.ds "] " \&
.ds [' '
.ds '] " \&
.ds [< " \&
.ds >]