commit https://github.com/vim/vim/commit/25e4fcde767084d1a79e0926bc301c92987c0cce Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 9 14:57:47 2016 +0100 patch 7.4.1065 Problem: Cannot use the "dll" options on MS-Windows. Solution: Support the options on all platforms. Use the built-in name as the default, so that it's clear what Vim is looking for.

Tests for writefile()

STARTTEST
:source small.vim
:%delete _
:let f = tempname()
:call writefile(["over","written"], f, "b")
:call writefile(["hello","world"], f, "b")
:call writefile(["!", "good"], f, "a")
:call writefile(["morning"], f, "ab")
:call writefile(["", "vimmers"], f, "ab")
:bwipeout!
:$put =readfile(f)
:1 delete _
:w! test.out
:qa!
ENDTEST