Minor formatting change

man7/arp.7

@@ -257,9 +257,9 @@ The neigh/* sysctls did not exist before Linux 2.2.
 .BR capabilities (7),
 .BR ip (7)
 .PP
-RFC826 for a description of ARP.
+RFC\ 826 for a description of ARP.
 .br
-RFC2461 for a description of IPv6 neighbour discovery and the base
+RFC\ 2461 for a description of IPv6 neighbour discovery and the base
 algorithms used.
 .LP
 Linux 2.2+ IPv4 ARP uses the IPv6 algorithms when applicable.

man7/icmp.7

@@ -9,7 +9,7 @@
 icmp, IPPROTO_ICMP \- Linux IPv4 ICMP kernel module. 
 .SH DESCRIPTION
 This kernel protocol module implements the Internet Control Message Protocol 
-defined in RFC792. It is used to signal error conditions and for diagnosis.
+defined in RFC\ 792. It is used to signal error conditions and for diagnosis.
 The user doesn't interact directly with this module; instead it communicates
 with the other protocols in the kernel and these pass the ICMP 
 errors to the application layers. The kernel ICMP module also
@@ -86,7 +86,7 @@ raw sockets, this feature
 should not be relied on in portable programs.
 .\" not really true ATM
 .\" .PP
-.\" Linux ICMP should be compliant to RFC1122.
+.\" Linux ICMP should be compliant to RFC 1122.
 .PP
 .B ICMP_REDIRECT
 packets are not sent when Linux is not acting as a router.
@@ -113,4 +113,4 @@ was removed in Linux 2.2.
 .SH "SEE ALSO"
 .BR ip (7)
 .PP
-RFC792 for a description of the ICMP protocol.
+RFC\ 792 for a description of the ICMP protocol.

man7/ipv6.7

@@ -248,7 +248,7 @@ need to be changed to use
 .B struct sockaddr_storage
 for that instead.
 .SH BUGS
-The IPv6 extended API as in RFC2292 is currently only partly implemented;
+The IPv6 extended API as in RFC\ 2292 is currently only partly implemented;
 although the 2.2 kernel has near complete support for receiving options,
 the macros for generating IPv6 options are missing in glibc 2.1. 
 .PP
@@ -261,6 +261,6 @@ This man page is not complete.
 .BR cmsg (3),
 .BR ip (7)
 .PP
-RFC2553: IPv6 BASIC API. Linux tries to be compliant to this.
+RFC\ 2553: IPv6 BASIC API. Linux tries to be compliant to this.
 .PP
-RFC2460: IPv6 specification. 
+RFC\ 2460: IPv6 specification. 

man7/raw.7

@@ -36,7 +36,7 @@ All packets or errors matching the
 .I protocol
 number specified
 for the raw socket are passed to this socket.  For a list of the
-allowed protocols see RFC1700 assigned numbers and
+allowed protocols see RFC\ 1700 assigned numbers and
 .BR getprotobyname (3).
 
 A protocol of
@@ -254,10 +254,10 @@ This man page was written by Andi Kleen.
 .BR ip (7),
 .BR socket (7)
 
-.B RFC1191 
+.B RFC\ 1191 
 for path MTU discovery.
 
-.B RFC791 
+.B RFC\ 791 
 and the
 .B <linux/ip.h>
 include file for the IP protocol.

man7/udp.7

@@ -15,7 +15,7 @@ udp \- User Datagram Protocol for IPv4
 .br
 .B udp_socket = socket(PF_INET, SOCK_DGRAM, 0); 
 .SH DESCRIPTION
-This is an implemention of the User Datagram Protocol described in RFC768. It 
+This is an implemention of the User Datagram Protocol described in RFC\ 768. It 
 implements a connectionless, unreliable datagram packet service.
 Packets may be reordered or duplicated before they arrive. UDP
 generates and checks checksums to catch transmission errors.  
@@ -87,7 +87,7 @@ that was sent on the same socket.
 This behaviour differs from many other BSD socket implementations
 which don't pass any errors unless the socket is connected.
 Linux's behaviour is mandated by 
-.BR RFC1122 .
+.BR RFC\ 1122 .
 
 For compatibility with legacy code it is possible to set the
 .B SO_BSDCOMPAT  
@@ -155,8 +155,8 @@ This man page was written by Andi Kleen.
 .BR raw (7),
 .BR socket (7)
 
-RFC768 for the User Datagram Protocol.
+RFC\ 768 for the User Datagram Protocol.
 .br
-RFC1122 for the host requirements.
+RFC\ 1122 for the host requirements.
 .br
-RFC1191 for a description of path MTU discovery.
+RFC\ 1191 for a description of path MTU discovery.