diff --git a/Doc/library/traceback.rst b/Doc/library/traceback.rst
index 066ee96..e107b25 100644
--- a/Doc/library/traceback.rst
+++ b/Doc/library/traceback.rst
@@ -85,14 +85,14 @@ The module defines the following functions:
 
 .. function:: extract_tb(tb, limit=None)
 
-   Return a list of "pre-processed" stack trace entries extracted from the
-   traceback object *tb*.  It is useful for alternate formatting of
-   stack traces.  The optional *limit* argument has the same meaning as for
-   :func:`print_tb`.  A "pre-processed" stack trace entry is a 4-tuple
-   (*filename*, *line number*, *function name*, *text*) representing the
-   information that is usually printed for a stack trace.  The *text* is a
-   string with leading and trailing whitespace stripped; if the source is
-   not available it is ``None``.
+   Returns a :class:`StackSummary` object representing a list of "pre-processed"
+   stack trace entries extracted from the traceback object *tb*.  It is useful
+   for alternate formatting of stack traces.  The optional *limit* argument has
+   the same meaning as for :func:`print_tb`.  A "pre-processed" stack trace
+   entry is a :class:`FrameSummary` object containing attributes *filename*,
+   *lineno*, *name*, and *line* representing the information that is usually
+   printed for a stack trace.  The *line* is a string with leading and trailing
+   whitespace stripped; if the source is not available it is ``None``.
 
 
 .. function:: extract_stack(f=None, limit=None)
@@ -104,12 +104,12 @@ The module defines the following functions:
 
 .. function:: format_list(extracted_list)
 
-   Given a list of tuples as returned by :func:`extract_tb` or
-   :func:`extract_stack`, return a list of strings ready for printing. Each
-   string in the resulting list corresponds to the item with the same index in
-   the argument list.  Each string ends in a newline; the strings may contain
-   internal newlines as well, for those items whose source text line is not
-   ``None``.
+   Given a list of tuples or :class:`FrameSummary` objects as returned by
+   :func:`extract_tb` or :func:`extract_stack`, return a list of strings ready
+   for printing. Each string in the resulting list corresponds to the item with
+   the same index in the argument list.  Each string ends in a newline; the
+   strings may contain internal newlines as well, for those items whose source
+   text line is not ``None``.
 
 
 .. function:: format_exception_only(etype, value)
@@ -287,9 +287,9 @@ capture data for later printing in a lightweight fashion.
 
    .. classmethod:: from_list(a_list)
 
-      Construct a :class:`StackSummary` object from a supplied old-style list
-      of tuples. Each tuple should be a 4-tuple with filename, lineno, name,
-      line as the elements.
+      Construct a :class:`StackSummary` object from a supplied list of
+      :class:`FrameSummary` objects or old-style list of tuples. Each tuple
+      should be a 4-tuple with filename, lineno, name, line as the elements.
 
    .. method:: format()