Some more log message tweaks

- aggregate the `MsgStream.aclose()` "reader tasks" stats content into a
  common `message: str` before emit.
- tweak an `_rpc.process_messages()` emit per new `Channel.__repr__()`.

tractor/_rpc.py

@@ -1219,8 +1219,10 @@ async def process_messages(
         # -[ ] figure out how this will break with other transports?
         tc.report_n_maybe_raise(
             message=(
-                f'peer IPC channel closed abruptly?\n\n'
+                f'peer IPC channel closed abruptly?\n'
-                f'<=x {chan}\n'
+                f'\n'
+                f'<=x[\n'
+                f'  {chan}\n'
                 f'  |_{chan.raddr}\n\n'
             )
             +

tractor/_streaming.py

@@ -437,22 +437,23 @@ class MsgStream(trio.abc.Channel):
             message: str = (
                 f'Stream self-closed by {this_side!r}-side before EoC from {peer_side!r}\n'
                 # } bc a stream is a "scope"/msging-phase inside an IPC
-                f'x}}>\n'
+                f'c}}>\n'
                 f'  |_{self}\n'
             )
-            log.cancel(message)
-            self._eoc = trio.EndOfChannel(message)
-
             if (
                 (rx_chan := self._rx_chan)
                 and
                 (stats := rx_chan.statistics()).tasks_waiting_receive
             ):
-                log.cancel(
+                message += (
-                    f'Msg-stream is closing but there is still reader tasks,\n'
+                    f'AND there is still reader tasks,\n'
+                    f'\n'
                     f'{stats}\n'
                 )
 
+            log.cancel(message)
+            self._eoc = trio.EndOfChannel(message)
+
         # ?XXX WAIT, why do we not close the local mem chan `._rx_chan` XXX?
         # => NO, DEFINITELY NOT! <=
         # if we're a bi-dir `MsgStream` BECAUSE this same
@@ -811,13 +812,12 @@ async def open_stream_from_ctx(
                 # sanity, can remove?
                 assert eoc is stream._eoc
 
-                log.warning(
+                log.runtime(
                     'Stream was terminated by EoC\n\n'
                     # NOTE: won't show the error <Type> but
                     # does show txt followed by IPC msg.
                     f'{str(eoc)}\n'
                 )
-
         finally:
             if ctx._portal:
                 try: