patch 8.0.1071: putty-color and cygwin-color are not recognized commit https://github.com/vim/vim/commit/c6da01a5b8efe9ca4931074c0cf2189d357707a2 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 7 22:37:36 2017 +0200 patch 8.0.1071: putty-color and cygwin-color are not recognized Problem: $TERM names starting with "putty" and "cygwin" are likely to have a dark background, but are not recognized. Solution: Only check the first few characters of $TERM to match "putty" or "cygwin". (Christian Brabandt)

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