commit https://github.com/vim/vim/commit/c8ce615299b4d8c1b2e6cf83496f48cd497d8a37 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 7 13:48:20 2016 +0200 patch 7.4.2174 Problem: Adding duplicate flags to 'whichwrap' leaves commas behind. Solution: Also remove the commas. (Naruhiko Nishino)

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