bug#354: "Added (how many lines, bytes?!) to file.txt"

[jidanni@jidanni.org]

Gentlemen, (I sound like Prince's "Partyman" song)
I noticed all append-to-file says is
"Added to /var/neurdsbeurg.txt".

The problem is often the user thinks "good, thanks", when days later
he discovers few or no lines got added, that's right, even 0 bytes
will produce the same message. You see often we are not fully aware of
the extent of our regions, colored or not, especially when extending
off the screen.

Therefore I propose you change that message to say instead how many
line or bytes or characters or both or all three were copied over.

All this of course also applies to write-region.