# HG changeset patch
# User markus schnalke <meillo@marmaro.de>
# Date 1338631120 -7200
# Node ID 7ca31b06b653a96a3a85a092267da6b665f54999
# Parent  26a2e3d2f9d3598649f01dd7da8b209361853d01
Preface: Added some lines about source code commit references.

diff -r 26a2e3d2f9d3 -r 7ca31b06b653 preface.roff
--- a/preface.roff	Sat Jun 02 11:45:06 2012 +0200
+++ b/preface.roff	Sat Jun 02 11:58:40 2012 +0200
@@ -194,6 +194,21 @@
 Meaning of `foo(1)'.
 RFCs.
 .P
+References to source code repository commits are printed as
+.Ci 1a2b3c4 .
+They can be looked up with
+.Cl "git show XXX
+on the command line or
+online at
+.CW "http://git.marmaro.de/?p=mmh;a=commitdiff;h=XXX" ,
+replacing `\f(CWXXX\fP' with the hash value.
+In this example:
+.Cl "git show 1a2b3c4
+or
+.CW "http://git.marmaro.de/?p=mmh;a=commitdiff;h=1a2b3cd" .
+Whereas the code repository will probably be available on the Internet
+forever, a website URL is always at risk to change.
+.P
 This thesis is divided into XXX chapters, ...
 .P
 .I Chapter 1