bug#798: Info-hide-note-references and filling

[Glenn Morris]

emacs -Q
(info "(/path/to/your/build/info/emacs)Diary Customizing")

Scroll down to paragraph four. With the default value of
Info-hide-note-references, the display looks poor:

  recognizing a date.  Each date pattern is a list whose elements may be
  regular expressions (see Regular Expressions(elisp)
  .) or the symbols `month', `day', `year', `monthname', and

Note the big gap after '(elisp)', with an odd looking full-stop at the
start of the next line.

With Info-hide-note-references nil, the original text shows why this
happened:

  recognizing a date.  Each date pattern is a list whose elements may be
  regular expressions (*note Regular Expressions: (elisp)Regular
  Expressions.) or the symbols `month', `day', `year', `monthname', and


It would be nice if the Info-hide-note-references mechanism could do
some re-filling.