bpo-44072: fix Complex, Integral docs for `**` (GH-25986)


In numbers module docstrings and docs.
(cherry picked from commit 4aa63d65a9971d14f1a2131b989dca0dab514a9d)

Co-authored-by: Rory Yorke <rory.yorke@gmail.com>
diff --git a/Lib/numbers.py b/Lib/numbers.py
index ed815ef..5b98e64 100644
--- a/Lib/numbers.py
+++ b/Lib/numbers.py
@@ -33,7 +33,7 @@ class Complex(Number):
     """Complex defines the operations that work on the builtin complex type.
 
     In short, those are: a conversion to complex, .real, .imag, +, -,
-    *, /, abs(), .conjugate, ==, and !=.
+    *, /, **, abs(), .conjugate, ==, and !=.
 
     If it is given heterogeneous arguments, and doesn't have special
     knowledge about them, it should fall back to the builtin complex
@@ -292,7 +292,11 @@ def __float__(self):
 
 
 class Integral(Rational):
-    """Integral adds a conversion to int and the bit-string operations."""
+    """Integral adds methods that work on integral numbers.
+
+    In short, these are conversion to int, pow with modulus, and the
+    bit-string operations.
+    """
 
     __slots__ = ()