Make the backslash visible in ip manpage.

See Debian bug #285507 - http://bugs.debian.org/285507

--- orig/man/man8/ip.8	2004-10-19 20:49:02.000000000 +0000
+++ new/man/man8/ip.8	2005-01-05 22:04:12.000000000 +0000
@@ -374,7 +374,7 @@
 .BR "\-o" , " \-oneline"
 output each record on a single line, replacing line feeds
 with the
-.B '\'
+.B '\e\'
 character. This is convenient when you want to count records 
 with
 .BR wc (1)