epm-query_file: more clean output on Slackware

bin/epm-query_file

@@ -85,7 +85,7 @@ __do_query()
             ;;
         slackpkg)
             # note: need remove leading slash for grep
-            docmd grep -R "$(echo $@ | sed -e 's|^/\+||g')" /var/log/packages
+            docmd grep -R "$(echo $@ | sed -e 's|^/\+||g')" /var/log/packages | sed -e "s|/var/log/packages/||g"
             return
             ;;
         *)