Revert advanced-fault UDS edge case handling

Namely the workaround expected exc branches added in ef7ed7a for the UDS
parametrization. With the new boxing of the underlying CREs as
tpt-closed, we can expect the same exc outcomes as in the TCP cases.

Also this tweaks some error report logging content used while debugging
this,
- properly `repr()` the `TransportClosed.src_exc`-type from
  the maybe emit in `.report_n_maybe_raise()`.
- remove the redudant `chan.raddr` from the "closed abruptly"
  header in the tpt-closed handler of `._rpc.process_messages()`,
  the `Channel.__repr__()` now contains it by default.

tests/test_advanced_faults.py

@@ -146,9 +146,6 @@ def test_ipc_channel_break_during_stream(
         # a user sending ctl-c by raising a KBI.
         if pre_aclose_msgstream:
             expect_final_exc = KeyboardInterrupt
-            if tpt_proto == 'uds':
-                expect_final_exc = TransportClosed
-                expect_final_cause = trio.BrokenResourceError
 
             # XXX OLD XXX
             # if child calls `MsgStream.aclose()` then expect EoC.
@@ -169,10 +166,6 @@ def test_ipc_channel_break_during_stream(
         if pre_aclose_msgstream:
             expect_final_exc = KeyboardInterrupt
 
-            if tpt_proto == 'uds':
-                expect_final_exc = TransportClosed
-                expect_final_cause = trio.BrokenResourceError
-
     # NOTE when the parent IPC side dies (even if the child does as well
     # but the child fails BEFORE the parent) we always expect the
     # IPC layer to raise a closed-resource, NEVER do we expect

tractor/_exceptions.py

@@ -982,6 +982,7 @@ class TransportClosed(Exception):
         '''
         __tracebackhide__: bool = hide_tb
         message: str = message or self.message
+
         # when a cause is set, slap it onto the log emission.
         if cause := self.src_exc:
             cause_tb_str: str = ''.join(
@@ -989,7 +990,7 @@ class TransportClosed(Exception):
             )
             message += (
                 f'{cause_tb_str}\n'  # tb
-                f'    {cause}\n'  # exc repr
+                f'{cause!r}\n'  # exc repr
             )
 
         getattr(

tractor/_rpc.py

@@ -1314,11 +1314,9 @@ async def process_messages(
                 f'\n'
                 f'<=x[\n'
                 f'{chan}\n'
-                f'  |_{chan.raddr}\n\n'
             )
             +
             tc.message
-
         )
 
         # transport **WAS** disconnected