Add quotespace filter that adds a thinspace between adjacent quotation marks

[egh]

This filter adds a thinspace (U+2009) between adjacent quotation marks, e.g "' -> " '.

[egh]

Thanks for the comment. I've added some doctests. I also added a _mk_unicode_re method that explodes a unicode character (e.g. U+2019) into a re (e.g. "\u2019|’|’|’") to make those regular expressions a little easier.

[Chimrod]

Hello egh,

I've made something similar for my own blog, with french rules typographics.

Note that U+202F is not correctly suported by all browers, and I used nowrap attribute with   instead.
I took a look in your code and saw I've did something similar by extracting some code for amp
I'm using locale for seeing if I need to apply my substitution or not.

pull request : #5

[chrisdrackett]

@egh We've done a lot of work to revive and update the project recently and this pull request is now pretty out of date. If you would like to submit a new request we would be happy to review it. Thanks!