Silence diff.

_edit-and-update.bash

@@ -7,7 +7,7 @@ cp "$1" "$1.real_orig"
 ${EDITOR_ORIG:-editor} "$1"
 
 # Update last_changed to today or append, only if changed
-if ! diff "$1" "$1.real_orig"; then
+if ! diff "$1" "$1.real_orig" &>/dev/null; then
     lc_line="last_changed: $(date +'%Y-%m-%d')"
     sed -i '/^last_changed:/{h;s/.*/'"$lc_line"'/};${x;/^$/{s//'"$lc_line"'/;H};x}' "$1"
 fi