[css-grid] Don't say 'treat like 0fr', since that doesn't currently have the right behavior invocation.

Author: tabatkins

css-grid/Overview.bs

@@ -2888,11 +2888,10 @@ Find the Size of an ''fr''</h4>
 			divided by the sum of the <a>flex factors</a> of the flexible tracks.
 
 		<li>
-			For the flexible tracks,
-			if the product of the <a>hypothetical flex fraction</a> and the track's <a>flex factor</a>
+			If the product of the <a>hypothetical flex fraction</a> and a flexible track's <a>flex factor</a>
 			is less than the track's base size,
 			restart this algorithm
-			treating all such tracks as having a <a>flex factor</a> of zero.
+			treating all such tracks as inflexible.
 
 		<li>
 			Return the <a>hypothetical flex fraction</a>.

css-grid/Overview.html

@@ -2940,11 +2940,10 @@ <h4 class="heading settled heading" data-level=10.6.1 id=algo-find-fr-size><span
 			divided by the sum of the <a data-link-type=dfn title="flex factors">flex factors</a> of the flexible tracks.
 
 		<li>
-			For the flexible tracks,
-			if the product of the <a data-link-type=dfn href=#hypothetical-flex-fraction title="hypothetical flex fraction">hypothetical flex fraction</a> and the track’s <a data-link-type=dfn title="flex factor">flex factor</a>
+			If the product of the <a data-link-type=dfn href=#hypothetical-flex-fraction title="hypothetical flex fraction">hypothetical flex fraction</a> and a flexible track’s <a data-link-type=dfn title="flex factor">flex factor</a>
 			is less than the track’s base size,
 			restart this algorithm
-			treating all such tracks as having a <a data-link-type=dfn title="flex factor">flex factor</a> of zero.
+			treating all such tracks as inflexible.
 
 		<li>
 			Return the <a data-link-type=dfn href=#hypothetical-flex-fraction title="hypothetical flex fraction">hypothetical flex fraction</a>.