Issue 11929: Minor whitespace clean-ups.
diff --git a/Doc/includes/mp_pool.py b/Doc/includes/mp_pool.py
index e360703..1578498 100644
--- a/Doc/includes/mp_pool.py
+++ b/Doc/includes/mp_pool.py
@@ -25,18 +25,18 @@
     return calculate(*args)
 
 def mul(a, b):
-    time.sleep(0.5*random.random())
+    time.sleep(0.5 * random.random())
     return a * b
 
 def plus(a, b):
-    time.sleep(0.5*random.random())
+    time.sleep(0.5 * random.random())
     return a + b
 
 def f(x):
-    return 1.0 / (x-5.0)
+    return 1.0 / (x - 5.0)
 
 def pow3(x):
-    return x**3
+    return x ** 3
 
 def noop(x):
     pass