[3.7] bpo-35506: Remove redundant and incorrect links from keywords. (GH-11174). (GH-11232)

(cherry picked from commit 2b57c43f21f891df4c6f2294a3b9e1b9029a16b6)
diff --git a/Doc/library/pickle.rst b/Doc/library/pickle.rst
index 36f66a1..2d01d8b 100644
--- a/Doc/library/pickle.rst
+++ b/Doc/library/pickle.rst
@@ -923,7 +923,7 @@
 .. [#] Don't confuse this with the :mod:`marshal` module
 
 .. [#] This is why :keyword:`lambda` functions cannot be pickled:  all
-    :keyword:`lambda` functions share the same name:  ``<lambda>``.
+    :keyword:`!lambda` functions share the same name:  ``<lambda>``.
 
 .. [#] The exception raised will likely be an :exc:`ImportError` or an
    :exc:`AttributeError` but it could be something else.