Improve "Debugging Python programs in Emacs" section: realgud

README.org

@@ -5584,12 +5584,13 @@ configures =code-cells=.
 :CUSTOM_ID: sec:debug-python
 :END:
 
-Listing [[lst:pdb-example]] and [[lst:pdb-numpy]] show how to start using PDB.
-Debugging works better with =tool-bar-mode= enabled.
-Links of interest are:
-- [[https://realpython.com/python-debugging-pdb/][Python Debugging with PDB]]
+Listing [[lst:pdb-example]] and [[lst:pdb-numpy]] show how to start debugging by means
+of =pdb= or =realgud:pdb=.  [[https://github.com/realgud/realgud][RealGUD]] is the best option and in case of {{{kbd(M-x
+pdb)}}} debugging may work better with =tool-bar-mode= enabled.  Links of
+interest are:
 - [[https://github.com/realgud/realgud][RealGUD]] provides a nice interface to PDB by means of {{{kbd(M-x
-  realgud:pdb)}}}.
+  realgud:pdb)}}} that also works well with =tool-bar-mode= disabled.
+- [[https://realpython.com/python-debugging-pdb/][Python Debugging with PDB]]
 - [[https://docs.python.org/3/library/pdb.html][The Python Debugger]]
 - [[yt:vfPtGsSJldg][Introduction to PDB (Python-2.7 YouTube video)]]
 - [[https://stackoverflow.com/questions/7668979/how-do-you-watch-a-variable-in-pdb][How do you watch a variable in PDB? (Python-2.7)]]