patch 8.0.1770: assert functions don't return anything commit https://github.com/vim/vim/commit/65a5464985f980d2bbbf4e14d39d416dce065ec7 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 28 16:56:53 2018 +0200 patch 8.0.1770: assert functions don't return anything Problem: Assert functions don't return anything. Solution: Return non-zero when the assertion fails.

" Tests for complicated + argument to :edit command
function Test_edit()
  call writefile(["foo|bar"], "Xfile1") 
  call writefile(["foo/bar"], "Xfile2") 
  edit +1|s/|/PIPE/|w Xfile1| e Xfile2|1 | s/\//SLASH/|w
  call assert_equal(["fooPIPEbar"], readfile("Xfile1"))
  call assert_equal(["fooSLASHbar"], readfile("Xfile2"))
  call delete('Xfile1')
  call delete('Xfile2')
endfunction