component and print it
unquote expr string remove RFC-2822 quotes from \fIstr\fR
unmailto expr string remove `mailto:' and < > from \fIstr\fR
-trim expr trim trailing white-space from \fIstr\fR
+trim expr trim white-space from \fIstr\fR
putstr expr print \fIstr\fR
putstrf expr print \fIstr\fR in a fixed width
putnum expr print \fInum\fR