Remove duplicate words in docs. (GH-26167) (GH-26296)

(cherry picked from commit b06ed1d883cd79c920c514d8a1f4643cf93dc5e0)

Co-authored-by: Mariusz Felisiak <felisiak.mariusz@gmail.com>
diff --git a/Doc/library/enum.rst b/Doc/library/enum.rst
index 466d959..137fe50 100644
--- a/Doc/library/enum.rst
+++ b/Doc/library/enum.rst
@@ -595,8 +595,8 @@
 
    A :keyword:`class` decorator specifically for enumerations.  It replaces the
    :meth:`__repr__` method with one that shows *module_name*.*member_name*.  It
-   also injects the members, and their aliases, into the the global namespace
-   they were defined in.
+   also injects the members, and their aliases, into the global namespace they
+   were defined in.
 
 
 .. decorator:: property