Add some quoted string parsing tests

[madig]

Why does this fail?

[khaledhosny]

This PR is two years old know, close or rebase?

[madig]

It may need a rebase and investigation. I think I fished those strings out of a real .glyphs file.

[khaledhosny]

We need to first know if it is still an issue.

[madig]

Rebased on master, seems so.

[khaledhosny]

Looks like only two of the strings fail:

E       assert 'distributed' == 'distributed on an "AS IS" BASIS'
E         - distributed on an "AS IS" BASIS
E         + distributed

and

E       assert 'a"\\012"b' == 'a"\n"b'
E         + a"\012"b
E         - a"
E         - "b

The first one is quite bizarre, though.

[anthrotype]

They both look invalid to me, they should have quotes wrapping around as they contain space or special characters like inner quotes