1   $ hg init a

     2   $ cd a

     3 

     4   $ hg diff inexistent1 inexistent2

     5   inexistent1: No such file or directory

     6   inexistent2: No such file or directory

     7 

     8   $ echo bar > foo

     9   $ hg add foo

    10   $ hg ci -m 'add foo' -d '1000000 0'

    11 

    12   $ echo foobar > foo

    13   $ hg ci -m 'change foo' -d '1000001 0'

    14 

    15   $ hg --quiet diff -r 0 -r 1

    16   --- a/foo	Mon Jan 12 13:46:40 1970 +0000

    17   +++ b/foo	Mon Jan 12 13:46:41 1970 +0000

    18   @@ -1,1 +1,1 @@

    19   -bar

    20   +foobar

    21 

    22   $ hg diff -r 0 -r 1

    23   diff -r 74de3f1392e2 -r b8b5f023a6ad foo

    24   --- a/foo	Mon Jan 12 13:46:40 1970 +0000

    25   +++ b/foo	Mon Jan 12 13:46:41 1970 +0000

    26   @@ -1,1 +1,1 @@

    27   -bar

    28   +foobar

    29 

    30   $ hg --verbose diff -r 0 -r 1

    31   diff -r 74de3f1392e2 -r b8b5f023a6ad foo

    32   --- a/foo	Mon Jan 12 13:46:40 1970 +0000

    33   +++ b/foo	Mon Jan 12 13:46:41 1970 +0000

    34   @@ -1,1 +1,1 @@

    35   -bar

    36   +foobar

    37 

    38   $ hg --debug diff -r 0 -r 1

    39   diff -r 74de3f1392e2d67856fb155963441f2610494e1a -r b8b5f023a6ad77fc378bd95cf3fa00cd1414d107 foo

    40   --- a/foo	Mon Jan 12 13:46:40 1970 +0000

    41   +++ b/foo	Mon Jan 12 13:46:41 1970 +0000

    42   @@ -1,1 +1,1 @@

    43   -bar

    44   +foobar

    45