Improvement: print "Only in ..." to the right column

[Xubor]

If the file exists on "one side" only (while recursive comparison), it will be nice if the output message "Only in

: " will be printed to the column where the file in fact exists.
So if file exists only in right directory, the message "Only in..." will be printed only to the rigth column.

This will greatly improve readibility of the output while comparing big directories.

Probably this behaviour can be configurable.