For review: Font styles & font fallback

The article Font styles & font fallback 
<https://w3c.github.io/i18n-drafts/articles/typography/fontstyles.en.html> 
is out for wide review. We are looking for comments *by Thursday 3 
November*.

This article provides a non-exhaustive set of examples where choice of a 
font style may have a practical application. The existence of these 
distinct styles, with their practical influence on the reading of the 
text, has implications for fonts on the Web – you would typically want 
to choose a fallback font that has the same style, if one is available. 
We look at some implications for generic fonts and fallback mechanisms 
near the end.

Please send any comments as github issues by clicking on this link 
<https://github.com/w3c/i18n-drafts/issues/new?title=[articles/typography/fontstyles]%20%20BRIEF_TITLE_GOES_HERE&body=%5Bsource%5D%20%28https%3A%2F%2Fw3c.github.io%2Fi18n-drafts%2Farticles%2Ftypography%2Ffontstyles.en.html%29%20%5Ben%5D%0A%0A>, 
or on “Leave a comment” at the bottom of the article. (That will add 
some useful information to your comment.)