[3.12] gh-82378: Document the difference between sys.tracebacklimit and the limit arguments (GH-123286) (#123326)

gh-82378: Document the difference between sys.tracebacklimit and the limit arguments (GH-123286)
(cherry picked from commit 70bfef5)

Co-authored-by: CF Bolz-Tereick <[email protected]>

Author: miss-islington

Doc/library/traceback.rst

@@ -42,6 +42,14 @@ The module defines the following functions:
    :term:`file <file object>` or :term:`file-like object` to
    receive the output.
 
+   .. note::
+
+      The meaning of the *limit* parameter is different than the meaning
+      of :const:`sys.tracebacklimit`. A negative *limit* value corresponds to
+      a positive value of :const:`!sys.tracebacklimit`, whereas the behaviour of
+      a positive *limit* value cannot be achieved with
+      :const:`!sys.tracebacklimit`.
+
    .. versionchanged:: 3.5
        Added negative *limit* support.