commit https://github.com/vim/vim/commit/76efafba2af36ae5f6c7b79b56c537fcbcdb386c Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 27 14:21:21 2016 +0200 patch 7.4.2265 Problem: printf() isn't tested much. Solution: Add more tests for printf(). (Dominique Pelle)

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