X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/5af4276c8e64d28f4d43e2ebb5938e9ba2c93cfa..75eb9d3b51f2d6742b0f71fc2bf90a59c6bc0356:/doc/sources.list.5.xml

diff --git a/doc/sources.list.5.xml b/doc/sources.list.5.xml
index 9eb66d728..b875086ef 100644
--- a/doc/sources.list.5.xml
+++ b/doc/sources.list.5.xml
@@ -48,9 +48,12 @@
  
  <refsect1><title>sources.list.d</title>
    <para>The <filename>/etc/apt/sources.list.d</filename> directory provides
-   a way to add sources.list entries in separate files whose names end with 
-   <literal>.list</literal>. The format is the same as for the regular
-   <filename>sources.list</filename> file. </para>
+   a way to add sources.list entries in separate files.
+   The format is the same as for the regular <filename>sources.list</filename> file.
+   File names need to end with
+   <filename>.list</filename> and may only contain letters (a-z and A-Z),
+   digits (0-9), underscore (_), hyphen (-) and period (.) characters.
+   Otherwise they will be silently ignored.</para>
  </refsect1>
 
  <refsect1><title>The deb and deb-src types</title>