.im man.im
.NM echoarg echo arguments to output
.SY echoarg [argument ...]
.FU
.ital echoarg
copies its command line arguments to its output as a line of text with
one space between each argument.  If there are no arguments, no
output is produced.

It is mostly useful to get a line containing all files that match
a given pattern into a file.
.EG
To see if your system is alive:
.Q1
echoarg hello world!
.ital hello world!
.Q2
To get a sorted list of files that match a pattern:
.Q1
echoarg *.fmt }temp1
translit " " \@n {temp1
.Q2