changed style of `file` slightly to help tell it apart from `code`

Conflicts:
	css/_media_popup.css

css/content.css

@@ -88,10 +88,6 @@
     text-decoration: underline;
 }
 
-/* for code in <file> */
-.dokuwiki pre.file {
-}
-
 /* filenames for downloadable file and code blocks */
 .dokuwiki dl.code,
 .dokuwiki dl.file {
@@ -121,6 +117,13 @@
     margin: 0;
 }
 
+/* for code in <file> */
+.dokuwiki pre.file,
+.dokuwiki dl.file pre,
+.dokuwiki dl.file dt {
+    border-color: __text_neu__;
+}
+
 
 /*____________ media manager ____________*/