tests/test-alias.t

15596:2555f441a32f

   update     update working directory (or switch revisions)
  
  use "hg help" for the full list of commands or "hg -v" for details
  [255]

15603:36d7a0c7505f

   update     update working directory (or switch revisions)
  
  use "hg help" for the full list of commands or "hg -v" for details
  [255]

This should show id:

  $ hg --config alias.log='id' log
  000000000000 tip

This shouldn't:

  $ hg --config alias.log='id' history