Fix flake8

intro-to-threading/prodcom_event.py

@@ -7,7 +7,10 @@ import time
 
 
 class Pipeline:
-    """Class to allow a single element pipeline between producer and consumer."""
+    """
+    Class to allow a single element pipeline
+    between producer and consumer.
+    """
 
     def __init__(self):
         self.value = 0

intro-to-threading/prodcom_lock.py

@@ -8,7 +8,10 @@ SENTINEL = object()
 
 
 class Pipeline:
-    """Class to allow a single element pipeline between producer and consumer."""
+    """
+    Class to allow a single element pipeline
+    between producer and consumer.
+    """
 
     def __init__(self):
         self.message = 0