[Snek] [keith-packard/snek] 5e55b4: doc: Remove attempts at character formatting in so...

[Keith Packard]

  Branch: refs/heads/remove-source-formatting
  Home:   https://github.com/keith-packard/snek
  Commit: 5e55b4b5935b0f6cd89cfa37ef8e49c9570f7e4e
      https://github.com/keith-packard/snek/commit/5e55b4b5935b0f6cd89cfa37ef8e49c9570f7e4e
  Author: Keith Packard <keithp at keithp.com>
  Date:   2021-11-08 (Mon, 08 Nov 2021)

  Changed paths:
    M chips/samd21/ao-flash-samd21.c
    M chips/samd21/snek-samd21.ld
    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>