[jhbuild] doc: Add missing quote to PATH adjustment

[Frederic Peters <fpeters src gnome org>]

commit 8ec6232c34f7259e5ba6597cf698021ce5408d8f
Author: Volker Sobek <reklov live com>
Date:   Sat Mar 8 13:36:29 2014 +0100

    doc: Add missing quote to PATH adjustment
    
    Fixing the same issue as commit 9046bdbc6b in another place in the
    documentation as well.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=704768

 doc/C/index.docbook |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/C/index.docbook b/doc/C/index.docbook
index 73e96ef..4a9b6f6 100644
--- a/doc/C/index.docbook
+++ b/doc/C/index.docbook
@@ -479,7 +479,7 @@
         <filename>~/.local/bin</filename> to the <envar>PATH</envar> variable,
         run the following command:</para>
 
-<screen><prompt>$</prompt> <userinput>echo PATH=$PATH:~/.local/bin &gt;&gt; ~/.bashrc</userinput></screen>
+<screen><prompt>$</prompt> <userinput>echo 'PATH=$PATH:~/.local/bin' &gt;&gt; ~/.bashrc</userinput></screen>
 
       <para>Test JHBuild works:</para>