[css-contain] size layout and paint don't apply to internal ruby elements

Closes w3c#2512

Author: frivoal

css-contain-1/Overview.bs

@@ -164,6 +164,7 @@ Size Containment</h3>
 
 	If the element does not generate a <a>principal box</a> (as is the case with ''display: contents'' or ''display: none''),
 	or if the element is an <a spec="css-display-3">internal table element</a>,
+	or if the element is an <a spec="css-display-3">internal ruby element</a>,
 	size containment has no effect.
 	Otherwise, giving an element <dfn export>size containment</dfn> has the following effect:
 
@@ -202,6 +203,7 @@ Layout Containment</h3>
 
 	If the element does not generate a <a>principal box</a> (as is the case with ''display: contents'' or ''display: none''),
 	or if the element is an <a spec="css-display-3">internal table element</a> other than ''display: table-cell'',
+	or if the element is an <a spec="css-display-3">internal ruby element</a>,
 	layout containment has no effect.
 	Otherwise, giving an element <dfn export>layout containment</dfn> has the following effects:
 
@@ -303,6 +305,7 @@ Paint Containment</h3>
 
 	If the element does not generate a <a>principal box</a> (as is the case with ''display: contents'' or ''display: none''),
 	or if the element is an <a spec="css-display-3">internal table element</a> other than ''display: table-cell'',
+	or if the element is an <a spec="css-display-3">internal ruby element</a>,
 	paint containment has no effect.
 	Otherwise, giving an element <dfn export>paint containment</dfn> has the following effects:
 
@@ -432,6 +435,7 @@ This appendix is <em>informative</em>.
 	<li>Remove the effects of style containment on the "break-*" properties.
 	<li>Move the description of the effects of containement on regions from this specification to [[CSS-REGIONS-1]].
 	<li>Clarify the effects of style scoping on counter-set and counter-increment
+	<li>Size layout and paint don't apply to internal ruby elements
 </ul>
 
 <h3 id="2017-04-19-changes">Changes from the

css-contain-1/issues-2017-cr.html

@@ -117,12 +117,14 @@ <h1>CSS Contain Level 1 Disposition of Comments for 2017-02-21 WD</h1>
 From:     Florian Rivoal
 Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/2510'>https://github.com/w3c/csswg-drafts/issues/2510</a>
 Open</pre>
-<pre class=' open' id='issue-10'>
+<pre class='a' id='issue-10'>
 Issue 10. <a href='#issue-10'>#</a>
 Summary:  Applicability size containment, layout containment and paint containment to internal ruby elements 
 From:     Florian Rivoal
 Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/2512'>https://github.com/w3c/csswg-drafts/issues/2512</a>
-Open</pre>
+Response: <a href='https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198'>https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198</a>
+Closed:   Accepted
+Resolved: <a href='https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198'>https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198</a></pre>
 <pre class='a' id='issue-11'>
 Issue 11. <a href='#issue-11'>#</a>
 Summary:  Move effects of containment on regions from [css-contain-1] to [css-regions-1]

css-contain-1/issues-2017-cr.txt

@@ -92,7 +92,9 @@ Issue 10.
 Summary:  Applicability size containment, layout containment and paint containment to internal ruby elements 
 From:     Florian Rivoal
 Comment:  https://github.com/w3c/csswg-drafts/issues/2512
-Open
+Response: https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198
+Closed:   Accepted
+Resolved: https://github.com/w3c/csswg-drafts/issues/2512#issuecomment-380353198
 ----
 Issue 11.
 Summary:  Move effects of containment on regions from [css-contain-1] to [css-regions-1]