asyncio: Truncate to 80 columns
diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index d1461fd..91e43cf 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -69,7 +69,8 @@
         """
         if (coroutines.iscoroutine(callback)
         or coroutines.iscoroutinefunction(callback)):
-            raise TypeError("coroutines cannot be used with add_signal_handler()")
+            raise TypeError("coroutines cannot be used "
+                            "with add_signal_handler()")
         self._check_signal(sig)
         self._check_closed()
         try: