patch 8.0.1096: terminal window in Normal mode has wrong background commit https://github.com/vim/vim/commit/238d43b32859d1b4e6b7072d552289a748cbfee1 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Sep 11 22:00:51 2017 +0200 patch 8.0.1096: terminal window in Normal mode has wrong background Problem: Terminal window in Normal mode has wrong background. Solution: Store the default background and use it for clearning until the end of the line. Not for below the last line, since there is no text there.

" Tests for :unlet

func Test_read_only()
  " these caused a crash
  call assert_fails('unlet count', 'E795:')
  call assert_fails('unlet errmsg', 'E795:')
endfunc

func Test_existing()
  let does_exist = 1
  call assert_true(exists('does_exist'))
  unlet does_exist
  call assert_false(exists('does_exist'))
endfunc

func Test_not_existing()
  unlet! does_not_exist
  call assert_fails('unlet does_not_exist', 'E108:')
endfunc

func Test_unlet_fails()
  call assert_fails('unlet v:["count"]', 'E46:')
endfunc