[typography] How are underlines positioned in Indic text?

r12a has just created a new issue for 
https://github.com/w3c/typography:

== How are underlines positioned in Indic text? ==
CSS and browser implementers are looking for information about how to 
position underlines for various scripts, especially for Indic scripts.
 Can we provide them with the information they need (and add it to the
 layout requirements doc)?

Follow/contribute to this issue at:
https://github.com/w3c/ilreq/issues/28

Please view or discuss this issue at 
https://github.com/w3c/typography/issues/11 using your GitHub account