bug#1726: 23.0.60; end-of-sentence and non-breaking space

[Richard M Stallman]

    This raw-byte char is what used to be called an eight-bit-control (or
    eight-bit-graphic depending on the actual value) char.

    I.e. "\xa0" is treated as a string that contains the \xa0 byte (i.e. an
    eight-bit-* (aka raw-byte) char) rather than the \xa0 char (a latin-1
    non-breaking space).

1. Is that the right thing for \xa0 in a string to mean?
Or should it mean the character with code xa0?

2. I find it hard to think about that question since I don't see any
documentation explaining how this ought to work.  That documentation
is essential.