Rename patch files

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@@ -298,10 +298,8 @@ fixes for the code that deals with equations.<tt> </tt>
 A detailed table of contents of at the beginning of the
 patch kit:
 <p>
-<a href="contrib/me-misc-patch"><b>me-misc-patch</b></a>
-<i>(39 kbytes)</i> &#183;
-<a href="contrib/me-misc-patch.gz"><b>me-misc-patch.gz</b></a>
-<i>(11 kbytes)</i>
+<a href="contrib/me-misc-patch.diff"><b>me-misc-patch</b></a>
+<i>(39 kbytes)</i>
 </dl>
 
 <p>
@@ -313,10 +311,8 @@ has contributed another large patch kit for unroff-1.0 that fixes
 several things in the -me support contributed earlier and in the -ms
 package and also adds some new functionality.
 <p>
-<a href="contrib/misc-patch-2"><b>misc-patch-2</b></a>
-<i>(79 kbytes)</i> &#183;
-<a href="contrib/misc-patch-2.gz"><b>misc-patch-2.gz</b></a>
-<i>(20 kbytes)</i>
+<a href="contrib/misc-patch-2.diff"><b>misc-patch-2</b></a>
+<i>(79 kbytes)</i>
 </dl>
 
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