notes double display of sigils

[Craig Berry]

Both ref and note elements display the n attribute as well as the content, so if “a” is the note indicator, you might see “a a” in the ref and another “a a” in the note itself.

[Craig Berry]

This was addressed by:

commit ff718b560f37bbc561143463a0034d7c2c4b5cf0
Author: Craig A. Berry <[e-mail]>
Date:   Mon Feb 21 07:21:54 2022 -0600

    Better note handling for page display

    We now suppress the @n attribute on note elements because we have
    a separate ref element and we were gettting duplicated references
    for on-screen display of notes.

    Also, treat place="bottom" the same as place="margin."  The bottom
    notes were appearing inline and there is no obvious way to make
    them appear at the bottom of the page, so put them in the margin.