[clreq] "extend to the top of adjacent base text"

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

== "extend to the top of adjacent base text" ==
3.3.4.1 Basic Requirements
http://w3c.github.io/clreq/#h-basic-requirements

>  Annotations are allowed to extend to the top of adjacent base text 
as long as the minimum spacing is ensured. 

What does this mean?  (a diagram might be helpful)


Please view or discuss this issue at 
https://github.com/w3c/clreq/issues/119 using your GitHub account