Little fix in sfeed_update
==========================


I use codemadness' sfeed as an RSS/Atom reader with its curses interface.
Noticed that new content for an entry with same id/title/link (e.g. edits
of a blog post after publishing) is not updated in feedfile when running
sfeed_update.

Issue: sort command inside merge() function.

    diff --git a/sfeed_update b/sfeed_update
    @@ -79,7 +79,7 @@ filter() {
     # merge raw files: unique sort by id, title, link.
     # merge(name, oldfile, newfile)
     merge() {
    -	sort -t '	' -u -k6,6 -k2,2 -k3,3 "$2" "$3" 2>/dev/null
    +	sort -t '	' -u -k6,6 -k2,2 -k3,3 "$3" "$2" 2>/dev/null
     }
 
     # order by timestamp (descending).
 

References
----------

*   https://codemadness.org/sfeed-simple-feed-parser.html
*   https://git.codemadness.org/sfeed/commit/e77e0165d3151ebe763a602adaa486af2467e6df.html