patch 8.2.0899: assert_equalfile() does not give a hint about the difference Commit: https://github.com/vim/vim/commit/30cc44a97f0ba1349e1a522dab22b11f47888183 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 4 16:52:40 2020 +0200 patch 8.2.0899: assert_equalfile() does not give a hint about the difference Problem: Assert_equalfile() does not give a hint about the difference. Solution: Display the last seen text.

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