updated for version 7.4.024 Problem: When root edits a file the undo file is owned by root while the edited file may be owned by another user, which is not allowed. (cac2s) Solution: Accept an undo file owned by the current user.

Tests for file with some lines ending in CTRL-M, some not

STARTTEST
:set ta tx
:e!
:$-3,$w! test.out
:qa!
ENDTEST

this lines ends in a
this one doesn't
this one does
and the last one doesn't