[css-flexbox] Avoid single-line confusion. Linkify more things.

Author: fantasai

css-flexbox/Overview.html

@@ -2167,11 +2167,11 @@ <h3 class="heading settled heading" data-level=9.4 id=cross-sizing><span class=s
 			<strong>Calculate the cross size of each flex line.</strong>
 
 			<p>
-				If the flex container has only a single line
-				(even if it’s a <a data-link-type=dfn href=#multi-line title=multi-line>multi-line</a> flex container)
-				and has a <a data-link-type=dfn href=#definite title=definite>definite</a> cross size,
-				the cross size of the flex line
-				is the flex container’s inner cross size.
+				If the flex container has only one <a data-link-type=dfn href=#flex-line title="flex line">flex line</a>
+				(even if it’s a <a data-link-type=dfn href=#multi-line title=multi-line>multi-line</a> <a data-link-type=dfn href=#flex-container title="flex container">flex container</a>)
+				and has a <a data-link-type=dfn href=#definite title=definite>definite</a> <a data-link-type=dfn href=#cross-size title="cross size">cross size</a>,
+				the <a data-link-type=dfn href=#cross-size title="cross size">cross size</a> of the <a data-link-type=dfn href=#flex-line title="flex line">flex line</a>
+				is the <a data-link-type=dfn href=#flex-container title="flex container">flex container</a>’s inner <a data-link-type=dfn href=#cross-size title="cross size">cross size</a>.
 
 			<p>
 				Otherwise,

css-flexbox/Overview.src.html

@@ -2154,11 +2154,11 @@ <h3 id='cross-sizing'>
 			<strong>Calculate the cross size of each flex line.</strong>
 
 			<p>
-				If the flex container has only a single line
-				(even if it's a <i>multi-line</i> flex container)
-				and has a <i>definite</i> cross size,
-				the cross size of the flex line
-				is the flex container's inner cross size.
+				If the flex container has only one <i>flex line</i>
+				(even if it's a <i>multi-line</i> <i>flex container</i>)
+				and has a <i>definite</i> <i>cross size</i>,
+				the <i>cross size</i> of the <i>flex line</i>
+				is the <i>flex container</i>'s inner <i>cross size</i>.
 
 			<p>
 				Otherwise,