Docstring fixes

Author: Dag Brattli

changes.md

@@ -6,6 +6,7 @@
   makes it much easier for editors and IDEs to validate the code and
   perform code completion.
 - Python 3.6+ only with type hints
+- Google docstring style.
 
 ## 1.5.0
 

examples/timeflies/timeflies_tkinter.py

@@ -25,7 +25,7 @@ def handle_label(i, label):
 
         def on_next(ev):
             label.place(x=ev.x + i*12 + 15, y=ev.y)
-        ys = mousemove.delay(i*100).subscribe_(on_next, scheduler=scheduler)
+        mousemove.delay(i*100).subscribe_(on_next, scheduler=scheduler)
 
     for i, label in enumerate(labels):
         handle_label(i, label)