[texhax] correct spacing between adjacent quote marks

[P. R. Stanley]

Hi folks
First off
thanks for the help with the previous thread.
The question concerns the correct amount of horizontal spacing 
between a single quote and a double quote mark. for example,
``\thinspace`bla bla'\thinspace''
`\thinspace``rabit rabit rabit''\thinspace'
or is it
`{}``my name is Michael Caine''{}'
``{}`That's a very tasteful peace of work, Miss Emmin'{}''

I suppose the next question is whether the full stop (or period to 
our North American friends) is simply the "." or some other control 
sequence. Again, do remember that I'm playing with plain Tex at this 
moment in time.
Thanks
Paul