gh-86509: Add link to Lib/_threading_local.py in threading docs (#101824)

diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
index b352125551fa79ef9c03023eb3b0bb12af2a4669..83ed48052704fb9bbdcebf755f2cf9089fcdd88f 100644 (file)
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -272,7 +272,7 @@ The instance's values will be different for separate threads.
    A class that represents thread-local data.
 
    For more details and extensive examples, see the documentation string of the
-   :mod:`_threading_local` module.
+   :mod:`_threading_local` module: :source:`Lib/_threading_local.py`.
 
 
 .. _thread-objects: