downloads.html.in: Kill useless spaces in <pre/>

The <pre/> section is rendered as-is on the page. That is, if all
the lines are prefixed with 4 spaces the rendered page will also
have them. Problem is if we put a box around such <pre/> because
the content might not fix into it.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

docs/downloads.html.in

@@ -437,7 +437,7 @@
     </p>
 
     <pre>
-      git clone git://libvirt.org/[module name].git</pre>
+git clone git://libvirt.org/[module name].git</pre>
 
     <p>
       In addition to this primary repository, there are the following read-only git
@@ -449,8 +449,8 @@
     </p>
 
     <pre>
-      <a href="https://github.com/libvirt/">https://github.com/libvirt/</a>
-      <a href="https://gitlab.com/libvirt/libvirt">https://gitlab.com/libvirt/</a></pre>
+<a href="https://github.com/libvirt/">https://github.com/libvirt/</a>
+<a href="https://gitlab.com/libvirt/libvirt">https://gitlab.com/libvirt/</a></pre>
 
   </body>
 </html>