[css-flexbox] Editorial fixes to the AMS section. Part of w3c#2385.

Author: tabatkins

css-flexbox-1/Overview.bs

@@ -897,23 +897,17 @@ Collapsed Items</h3>
 <h3 id="min-size-auto">
 Automatic Minimum Size of Flex Items</h3>
 
-	Note: The ''min-width/auto'' value of 'min-width' and 'min-height' is new.
-	It was initially introduced as the new initial value of these properties
-	in this specification;
-	its formal definition has now been moved
-	to the <a href="http://www.w3.org/TR/css-sizing/">CSS Sizing</a> module.
-	It is still required for a complete and correct implementation
-	of this module.
-
-	To provide a more reasonable default minimum size for <a>flex items</a>,
-	this specification defines that the ''min-width/auto'' keyword
-	of the 'min-width' and 'min-height' properties
-	[[!CSS-SIZING-3]]
-	(which represents their initial value)
-	applies a <dfn for="flexbox">content-based minimum size</dfn>
-	to <a>flex items</a> whose 'overflow' is ''overflow/visible'' in the <a>main axis</a>;
-	any other 'overflow' value causes the <a>automatic minimum size</a> to be zero,
-	as usual.
+	Note: The ''min-width/auto'' keyword,
+	representing an <a>automatic minimum size</a>,
+	is the new initial value of the 'min-width' and 'min-height' properties.
+	The keyword was previously defined in this specification,
+	but is now defined in the [[!CSS-SIZING-3|CSS Sizing]] module.
+
+	To provide a more reasonable default <a>minimum size</a> for <a>flex items</a>,
+	the used value of a <a>main axis</a> <a>automatic minimum size</a>
+	on a <a>flex item</a> whose 'overflow' is ''overflow/visible'' in the <a>main axis</a>
+	is a <dfn>content-based minimum size</dfn>;
+	any other 'overflow' value means the <a>automatic minimum size</a> is zero, as usual.
 
 	In general, the <a>content-based minimum size</a> of a <a>flex item</a>
 	is the smaller of its <a>content size suggestion</a> and its <a>specified size suggestion</a>.
@@ -929,14 +923,14 @@ Automatic Minimum Size of Flex Items</h3>
 	and are defined below:
 
 	<dl>
-		<dt><dfn dfn noexport>specified size suggestion</dfn>
+		<dt><dfn>specified size suggestion</dfn>
 		<dd>
 			If the item’s computed <a>main size property</a> is <a>definite</a>,
 			then the <a>specified size suggestion</a> is that size
 			(clamped by its <a>max main size property</a> if it's <a>definite</a>).
 			It is otherwise undefined.
 
-		<dt><dfn dfn noexport>transferred size suggestion</dfn>
+		<dt><dfn>transferred size suggestion</dfn>
 		<dd>
 			If the item has an intrinsic aspect ratio
 			and its computed <a>cross size property</a> is <a>definite</a>,
@@ -945,19 +939,19 @@ Automatic Minimum Size of Flex Items</h3>
 			converted through the aspect ratio.
 			It is otherwise undefined.
 
-		<dt><dfn dfn noexport>content size suggestion</dfn>
+		<dt><dfn>content size suggestion</dfn>
 		<dd>
 			The <a>content size suggestion</a> is the <a>min-content size</a> in the <a>main axis</a>,
 			clamped, if it has an aspect ratio, by any <a>definite</a> <a lt="min cross size property">min and max cross size properties</a> converted through the aspect ratio,
 			and then further clamped by the <a>max main size property</a> if that is <a>definite</a>.
 	</dl>
 
-	For the purpose of calculating an intrinsic size of the element
-	(e.g. the element's <a>min-content size</a>),
-	this value causes the element's size in that axis to become indefinite
+	For the purpose of calculating an intrinsic size of the box
+	(e.g. the box’s <a>min-content size</a>),
+	this value causes the box’s size in that axis to become indefinite
 	(even if e.g. its 'width' property specifies a <a>definite</a> size).
 	Note this means that percentages calculated against this size
-	will be treated as ''height/auto''.
+	will [=behave as auto=].
 
 	Nonetheless, although this may require an additional layout pass to re-resolve percentages in some cases,
 	this value