Uniformize debug logging calls.

Author: aaugustin

src/websockets/legacy/protocol.py

@@ -1231,7 +1231,8 @@ async def keepalive_ping(self) -> None:
             while True:
                 await asyncio.sleep(self.ping_interval)
 
-                self.logger.debug("% sending keepalive ping")
+                if self.debug:
+                    self.logger.debug("% sending keepalive ping")
                 pong_waiter = await self.ping()
 
                 if self.ping_timeout is not None:
@@ -1242,7 +1243,8 @@ async def keepalive_ping(self) -> None:
                             # Raises ConnectionClosed if the connection is lost,
                             # when connection_lost() calls abort_pings().
                             await pong_waiter
-                        self.logger.debug("% received keepalive pong")
+                        if self.debug:
+                            self.logger.debug("% received keepalive pong")
                     except asyncio.TimeoutError:
                         if self.debug:
                             self.logger.debug("- timed out waiting for keepalive pong")
@@ -1469,7 +1471,8 @@ def connection_lost(self, exc: Exception | None) -> None:
 
         """
         self.state = State.CLOSED
-        self.logger.debug("= connection is CLOSED")
+        if self.debug:
+            self.logger.debug("= connection is CLOSED")
 
         self.abort_pings()