.\"
.\" Tested with groff -Tps
.\" ----------------------------------------------------------------
.de 1
\m[red]internally unquoted:\m[]
.br
.2 \\$1
.br
\m[red]internally quoted:\m[]
.br
.2 "\\$1"
.sp
..
.de 2
\\$1
..
.\" ----------------------------------------------------------------
.sp 10v
.ll 9m
.nr ht 28v
\D'l 0 \n[ht]u'\h'\n[.l]u'\v'-\n[ht]u'\D'l 0 \n[ht]u'
.nh
.1 Long argument with spaces
.1 "Long argument with spaces"
.1 Long\ argument\ with\ spaces
.tr ~
.1 Long~argument~with~spaces
.1 """Long argument with spaces