Issue #23921: Standardized documentation whitespace formatting.
Original patch by James Edwards.
diff --git a/Doc/tutorial/modules.rst b/Doc/tutorial/modules.rst
index f5b8114..7b6fd9c 100644
--- a/Doc/tutorial/modules.rst
+++ b/Doc/tutorial/modules.rst
@@ -33,7 +33,7 @@
            print b,
            a, b = b, a+b
 
-   def fib2(n): # return Fibonacci series up to n
+   def fib2(n):   # return Fibonacci series up to n
        result = []
        a, b = 0, 1
        while b < n: