Mangled text in API docs for radio.receive

[microbit-matt-hillsdon]

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The docstring might require escaping? It's obviously not helpful to try to render \x0. Need to check the rules. I also don't entirely trust the restructured text -> markdown conversion that's going on. Could also reword in desperation 😄

    Equivalent to ``str(receive_bytes(), 'utf8')`` but with a check that the the first
    three bytes are ``b'\x01\x00\x01'`` (to make it compatible with other platforms that
    may target the micro:bit).

Screenshot taken on Windows (in case rendering differs).

[microbit-matt-hillsdon]

Text isn't in first line so no need to look at this for strings freeze.