[jlreq] Mojikumi rules in body text vs. ruby (#158)

stantonma has just created a new issue for https://github.com/w3c/jlreq:

== Mojikumi rules in body text vs. ruby ==
CSS has the following definition for `ruby-align:space-around`:

> The ruby content expands as defined for normal text justification (as defined by text-justify), except that if there are no justification opportunities the content is centered.

https://www.w3.org/TR/css-ruby-1/#ruby-align-property

The interesting part here is that it implies ruby text and body text should share the same mojikumi table. We're looking for feedback if that's truly correct, or if there could be exceptions.

At least one scenario that might need an exception is adding 1/2 em before opening brackets at the start of a paragraph, which seems like it shouldn't apply for ruby text.

Please view or discuss this issue at https://github.com/w3c/jlreq/issues/158 using your GitHub account