Minor quoting etc. fixes to misc manuals

Minor quoting etc. fixes to misc manuals

Fix some minor quoting and spacing issues.  Distinguish more
clearly among grave accent and apostrophe (which are ASCII) and
single quote (which is not).  Prefer the standard terms
"apostrophe" and "grave accent" to alternative names that can be
confusing.  Use apostrophes to single-quote ASCII text.
* doc/misc/remember.texi: Spell the mystic's pseudonym in UTF-8
rather than approximating it in ASCII with grave accent.