insque.3: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/insque.3

@@ -128,14 +128,17 @@ with the forward and backward pointers in each element suitably initialized.
 The program below demonstrates the use of
 .BR insque ().
 Here is an example run of the program:
+.in +4n
 .nf
-$ ./a.out -c a b c
+
+.RB "$ " "./a.out -c a b c"
 Traversing completed list:
     a
     b
     c
 That was a circular list
 .fi
+.in
 .SS Program source
 \&
 .nf