docs: add description to commands and index page

docs/content/commands/rclone_copyurl.md

@@ -1,6 +1,7 @@
 ---
-date: 2020-02-10T12:28:36Z
+date: 2020-05-18T10:38:09+01:00
 title: "rclone copyurl"
+description: "Copy url content to dest."
 slug: rclone_copyurl
 url: /commands/rclone_copyurl/
 # autogenerated - DO NOT EDIT, instead edit the source code in cmd/copyurl/ and as part of making a release run "make commanddocs"
@@ -34,8 +35,8 @@ rclone copyurl https://example.com dest:path [flags]
 
 ```
   -a, --auto-filename   Get the file name from the URL and use it for destination file path
-      --no-clobber      Prevent file overwriting on destination
   -h, --help            help for copyurl
+      --no-clobber      Prevent overwriting file with same name
       --stdout          Write the output to stdout rather than a file
 ```