commit https://github.com/vim/vim/commit/285bf84b4b9aca828828a8729b04cd59ab333dac Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jan 7 22:34:01 2016 +0100 patch 7.4.1061 Problem: Compiler warning for ignoring return value of fwrite(). Solution: Do use the return value. (idea: Charles Campbell)

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