closes bpo-32285: Add unicodedata.is_normalized. (GH-4806)


diff --git a/Doc/library/unicodedata.rst b/Doc/library/unicodedata.rst
index 59548f3..17e848b 100644
--- a/Doc/library/unicodedata.rst
+++ b/Doc/library/unicodedata.rst
@@ -133,6 +133,13 @@
    a human reader, if one has combining characters and the other
    doesn't, they may not compare equal.
 
+.. function:: is_normalized(form, unistr)
+
+   Return whether the Unicode string *unistr* is in the normal form *form*. Valid
+   values for *form* are 'NFC', 'NFKC', 'NFD', and 'NFKD'.
+
+   .. versionadded:: 3.8
+
 
 In addition, the module exposes the following constant: