[docs] [issue14979] pdb doc: Add link to source

Senthil Kumaran <senthil@uthcode.com> added the comment: Adding link to pdb source may be not be suitable. Readers may require to understand the states which pdb goes through. Docs here are better, IMO. -1 vote from me. ---------- nosy: +orsenthil _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue14979> _______________________________________