bug#24831: shr mangling messages

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > Another idea would be first run it through a validator.
  > If valid, proceed as before.
  > If invalid, just spew out all the text nodes of the whole document,
  > separated by spaces.

Do we have a validator in Emacs Lisp?  Or would we run one as a child?
What program is available?

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.