[Snek] [keith-packard/snek] 16d11f: doc: Remove attempts at character formatting in so...

[Keith Packard]

  Branch: refs/heads/main
  Home:   https://github.com/keith-packard/snek
  Commit: 16d11fe87d526c758f0b9f27ca36fb9792cc8335
      https://github.com/keith-packard/snek/commit/16d11fe87d526c758f0b9f27ca36fb9792cc8335
  Author: Keith Packard <keithp at keithp.com>
  Date:   2021-11-21 (Sun, 21 Nov 2021)

  Changed paths:
    M doc/snek.adoc

  Log Message:
  -----------
  doc: Remove attempts at character formatting in source samples

asciidoctor source mode doesn't handle character attributes like _foo_
in source blocks; it ends up leaving HTML style bits in the output.

Signed-off-by: Keith Packard <keithp at keithp.com>