bug #989672: pdb.doc and the help messages for the help_d and help_u methods
of the pdb.Pdb class gives have been corrected. d(own) goes to a newer frame,
u(p) to an older frame, not the other way around.
diff --git a/Lib/pdb.py b/Lib/pdb.py
index b35164c..58de097 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -755,7 +755,7 @@
     def help_d(self):
         print """d(own)
 Move the current frame one level down in the stack trace
-(to an older frame)."""
+(to a newer frame)."""
 
     def help_up(self):
         self.help_u()
@@ -763,7 +763,7 @@
     def help_u(self):
         print """u(p)
 Move the current frame one level up in the stack trace
-(to a newer frame)."""
+(to an older frame)."""
 
     def help_break(self):
         self.help_b()