Remove parens that stop compiler spec from passing

spec/TCP.Spec.savi

@@ -96,7 +96,7 @@
       @env.err.print("[EchoClient] Failed to connect.")
 
     | IO.Action.Read |
-      if (@io.read_stream.bytes_ahead_of_marker >= b"Hello, World!".size) (
+      if @io.read_stream.bytes_ahead_of_marker >= b"Hello, World!".size (
         bytes val = @io.read_stream.extract_all
         @env.err.print("[EchoClient] Received: \(Inspect[bytes])")
         @io.close

src/TCP.Engine.savi

@@ -33,7 +33,7 @@
 
     // If we failed to resolve any valid connection attempts, send the actor
     // a later IO action that will let it know that connection has failed.
-    if (@_pending_connect_count == 0) (
+    if @_pending_connect_count == 0 (
       actor.io_deferred_action(IO.Action.OpenFailed)
     )
 
@@ -53,7 +53,7 @@
     :yields IO.Action
     // If we haven't adopted an event yet, and this one is ready to be adopted,
     // try to adopt it now, as we expect it is one of our pending connections.
-    if (@io.is_waiting_to_open && event.is_writable) (
+    if @io.is_waiting_to_open && event.is_writable (
       try (
         @_pending_connect_count -= 1
         @io.adopt_event!(event)
@@ -62,7 +62,7 @@
         // We failed to adopt it because it was a failed connection attempt.
         // If there are no more pending connection attempts, our last one has
         // failed and we have no choice but to admit final failure.
-        if (@_pending_connect_count == 0) (
+        if @_pending_connect_count == 0 (
           yield IO.Action.OpenFailed
         )
 
@@ -98,7 +98,7 @@
         // If the underlying engine didn't want to handle this event, it means
         // this is likely a later connection attempt after we already had one.
         // If we have more connection attempts pending, we'll unsubscribe it.
-        if (@_pending_connect_count > 0) (
+        if @_pending_connect_count > 0 (
           @_pending_connect_count -= 1
           _FFI.pony_asio_event_unsubscribe(event.id)
         |
@@ -141,7 +141,7 @@
     while @io.is_readable (
       try (
         bytes_read = @read_stream.receive_from!(@io)
-        if (bytes_read > 0) (yield None)
+        if bytes_read > 0 (yield None)
       )
     )
 

src/TCP.Listen.Engine.savi

@@ -27,7 +27,7 @@
     @_listen_netaddr!.ip_address_with_port_number
 
   :fun _listen_netaddr!
-    error! if (@_fd == -1)
+    error! if @_fd == -1
     _NetAddress._for_fd(@_fd)
 
   :new (@_actor, ticket TCP.Listen.Ticket, @_limit = 0)
@@ -48,7 +48,7 @@
 
   // TODO: Delegate much of the AsioEvent internals to an `IO.CoreEngine`.
   :fun ref react(event AsioEvent) @
-    if (event.id === @_event_id) (
+    if event.id === @_event_id (
       if event.is_readable (
         yield IO.Action.Read
       )
@@ -67,7 +67,7 @@
     |
       if @_closed.not (
         try (
-          while (@_limit == 0 || @_count < @_limit) (
+          while @_limit == 0 || @_count < @_limit (
             conn_fd = _FFI.pony_os_accept(@_event_id)
             case conn_fd == (
             |  0 | error! // EWOULDBLOCK, don't try again
@@ -83,12 +83,12 @@
     )
 
   :fun ref deferred_action(action IO.Action)
-    if (action == IO.Action.ClosedChild) (
+    if action == IO.Action.ClosedChild (
       @_count -= 1
 
       // If releasing this connection takes us below the limit,
       // unpause acceptance and try to accept more connections.
-      if (@_paused && @_count < @_limit) (
+      if @_paused && @_count < @_limit (
         @_paused = False
         yield IO.Action.Read
       )
@@ -98,7 +98,7 @@
     @
 
   :fun ref close
-    if (@_closed.not && @_event_id.is_not_null) (
+    if @_closed.not && @_event_id.is_not_null (
       // When not on windows, unsubscribe immediately here instead of later.
       if Platform.is_windows.not _FFI.pony_asio_event_unsubscribe(@_event_id)