Add "longlist" and "source" commands, ideas borrowed from pdb++ by Antonio Cuni.
diff --git a/Misc/NEWS b/Misc/NEWS
index 65346fc..ef7433b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -475,6 +475,15 @@
Library
-------
+- The pdb command "source" has been added. It displays the source
+ code for a given object, if possible.
+
+- The pdb command "longlist" has been added. It displays the whole
+ source code for the current function.
+
+- Issue #1503502: Make pdb.Pdb easier to subclass by putting message
+ and error output into methods.
+
- Issue #809887: Make the output of pdb's breakpoint deletions more
consistent; emit a message when a breakpoint is enabled or disabled.