.\" THIS WILL FAIL ON OLD GROFF!
.\" IT DOESN'T PROCESS EMPTY `AR' MACROS CORRECTLY.
.Dd May 16, 2010
.Dt FOO 1
.Os
.Sh NAME
.Nm foo
.Nd bar
.Sh DESCRIPTION
.Ar . a
.Pp
.Ar ;
.Pp
.Ar expr1 Ar : expr2
.Pp
.Ar expr1 Ar . ; expr2 ( expr3 )
.Ar expr1 Ar . ; ) ( expr3 )