[BUG] 0.14 -- Improve error checking in of case "-r1:10"

[Jari Aalto]

Jari Aalto <jari.aalto at cante.net> writes:
>     $ bzr diff -r7:10 Html.pm
>     bzr: ERROR: No WorkingTree exists for file:///test/.bzr/checkout/.
>     bzr: H, -r7:10 looks like SVN style range. Did you mean -r7..10?

That'd have been:

     bzr: ERROR: No WorkingTree exists for file:///test/.bzr/checkout/.
     bzr: ERROR: possible range -r7:10 is unknown. Did you mean -r7..10?

Jari