tests/test-dispatch.py.out

wireprotov2: expose rich arguments metadata

Now that we internally store rich metadata about arguments, it makes
sense to make that metadata available to the client. This will allow
clients to validate outgoing command requests before they are sent
over the wire.

Strictly speaking, we should bump the wire protocol version for this
change since it is backwards incompatible. But no client-side code
touches the arguments map and I don't want to incur the work.

Differential Revision: https://phab.mercurial-scm.org/D4618

running: init test1
result: 0
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: 0
running: commit -m commit2 -d 2000-01-02 foo
result: 0
running: log -r 0
changeset:   0:0e4634943879
user:        test
date:        Sat Jan 01 00:00:00 2000 +0000
summary:     commit1

result: 0
running: log -r tip
changeset:   1:45589e459b2e
tag:         tip
user:        test
date:        Sun Jan 02 00:00:00 2000 +0000
summary:     commit2

result: 0