patch 8.1.1746: ":dl" is seen as ":dlist" instead of ":delete" commit https://github.com/vim/vim/commit/94f82cbacf76767b5ac32f813e1d670501dbd0e6 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 24 22:30:27 2019 +0200 patch 8.1.1746: ":dl" is seen as ":dlist" instead of ":delete" Problem: ":dl" is seen as ":dlist" instead of ":delete". Solution: Do not use cmdidxs2[] if the length is 1. (closes https://github.com/vim/vim/issues/4721)

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