bug#946: 23.0.60; html-mode regression ('' within a table)

[martin rudalics]

> Since this is working with sgml-tag-syntax-table, a better fix would be
> to make sure that ' doesn't have prefix syntax in that table.
>
>
>         Stefan "assuming this is indeed the problem"

IIUC `sgml-tag-syntax-table' inherits this from `text-mode-syntax-table'
and whatever is resonable for writing plain text should be reasonable
for writing marked up text.

martin "who wanted to fix this problem unobtrusively"