Add references to the Wikipedia article of the patch command

Fixes #31684
NixOS · Nov 17, 2017 · 480acb7 · 480acb7
1 parent eb85761
commit 480acb7
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diff --git a/doc/coding-conventions.xml b/doc/coding-conventions.xml
@@ -662,7 +662,9 @@ src = fetchFromGitHub {
 
 <section xml:id="sec-patches"><title>Patches</title>
   <para>Only patches that are unique to <literal>nixpkgs</literal> should be
-    included in <literal>nixpkgs</literal> source.</para>
+  included in <literal>nixpkgs</literal> source. For further information about
+  patches refer to the <link xlink:href="https://en.wikipedia.org/wiki/Patch_%28Unix%29">
+  Wikipedia article</link>.</para>
   <para>Patches available online should be retrieved using
     <literal>fetchpatch</literal>.</para>
   <para>

diff --git a/doc/stdenv.xml b/doc/stdenv.xml
@@ -532,10 +532,11 @@ Additional file types can be supported by setting the
 
   <varlistentry>
     <term><varname>patches</varname></term>
-    <listitem><para>The list of patches.  They must be in the format
-    accepted by the <command>patch</command> command, and may
-    optionally be compressed using <command>gzip</command>
-    (<filename>.gz</filename>), <command>bzip2</command>
+    <listitem><para>The list of patches. They must be in the format
+    accepted by the <command>patch</command> command (for further information
+    refer to the <link xlink:href="https://en.wikipedia.org/wiki/Patch_%28Unix%29">
+    Wikipedia article</link>), and may optionally be compressed using
+    <command>gzip</command> (<filename>.gz</filename>), <command>bzip2</command>
     (<filename>.bz2</filename>) or <command>xz</command>
     (<filename>.xz</filename>).</para></listitem>
   </varlistentry>