feat: discogs description and bugfixes

src/sh/cache.sh

@@ -24,7 +24,7 @@ __put_artist_json() {
   f="$artistdir/$2"
   tmpf=$(mktemp)
   cat >"$tmpf"
-  [ -s "$tmpf" ] && mv "$tmpf" "$f" || echo "{}" >"$f"
+  [ -s "$tmpf" ] && mv "$tmpf" "$f" || printf "{}" >"$f"
 }
 
 # Returns the cached MusicBrainz data for the artist given by the MusicBrainz