patch 8.1.1276: cannot combine text properties with syntax highlighting commit https://github.com/vim/vim/commit/de24a8701328b1cce7cad0ee11b415369b482420 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 5 15:48:00 2019 +0200 patch 8.1.1276: cannot combine text properties with syntax highlighting Problem: Cannot combine text properties with syntax highlighting. Solution: Add the "combine" field to prop_type_add(). (closes https://github.com/vim/vim/issues/4343)

function Test_Comparators()
  try
    let oldisident=&isident
    set isident+=#
    call assert_equal(1, 1 is#1)
  finally
    let &isident=oldisident
  endtry
endfunction