I presume that the "\r" usage was done intentionally, and that 
the subsequent $SAVECORE command output is supposed to over-write
the "Saving panic..." string: 

swapsavecore() {
        for dev in $(echo $DEVICE | tr ':' ' '); do
                $DISKDUMPFMT -c $dev 2> /dev/null
                if [ $? -eq 6 ]; then
                        echo -e $"Saving panic dump from swap partition:\r" >&2
                        $SAVECORE -D -p $dev
                        RETVAL=$?
                        echo -ne "\r" >&2
                fi
        done
}

As Dave said, the "\r" usage was done intentionally. It is required so as to show
a progress bar of savecore appropriately. If not "\r" but "\n" is used as
an escape sequence, then users see the following messages.

Saving panic dump from swap partition:
                                      ###############

Although the diskdumputils package is included in FC, diskdump facility
isn't included in FC's kernel. Consequently, if this bug is for FC, then
I won't fix anything because diskdump doesn't work with FC due to the above
reason. I don't think anyone could see the message which was written in
comment #2.

Regards,
Akira

I won't fix anything due to the following reasons, so I close this BZ.
- Although this does not affect to anything, many modifications will
  be required.