[css-flexbox] Some shuffling of <dfn>s.

--HG--
extra : rebase_source : 6860871968cfce17224bb0c89f7ae138f89a3930

Author: fantasai

css-flexbox/Overview.bs

@@ -403,8 +403,10 @@ Values</h3>
 Flex Layout Box Model and Terminology</h2>
 
 	<p>
-		A box with ''display:flex'' or ''display:inline-flex'' is a <i>flex container</i>.
-		Children of a flex container are called <i>flex items</i> and are laid out using the flex layout model.
+		A <dfn export>flex container</dfn> is the box generated by an element with a
+		computed 'display' of 'flex' or 'inline-flex'.
+		In-flow children of a flex container are called <dfn export title="flex item" id="flex-item">flex items</dfn>
+		and are laid out using the flex layout model.
 
 	<p>
 		Unlike block and inline layout,
@@ -491,7 +493,7 @@ Flex Containers: the <a href="#display-flex">''flex''</a> and <a href="#display-
 	</dl>
 
 	<p>
-		A <dfn export>flex container</dfn> establishes a new <dfn export>flex formatting context</dfn> for its contents.
+		A <i>flex container</i> establishes a new <dfn export>flex formatting context</dfn> for its contents.
 		This is the same as establishing a block formatting context,
 		except that flex layout is used instead of block layout:
 		floats do not intrude into the flex container,
@@ -511,9 +513,10 @@ Flex Containers: the <a href="#display-flex">''flex''</a> and <a href="#display-
 			all of the 'column-*' properties in the Multicol module have no effect on a flex container.
 
 		<li>
-			'float' and 'clear' have no effect on a <i>flex item</i>.
-			(However, the 'float' property still affects the computed value of 'display' on children of a flex container,
-			as this occurs <em>before</em> <i>flex items</i> are determined.)
+			'float' and 'clear' have no effect on a <i>flex item</i>,
+			and do not take it out-of-flow.
+			However, the 'float' property can still affect box generation
+			by influencing the 'display' property's computed value.
 
 		<li>
 			'vertical-align' has no effect on a flex item.
@@ -535,7 +538,7 @@ Flex Containers: the <a href="#display-flex">''flex''</a> and <a href="#display-
 Flex Items</h2>
 
 	<p>
-		The contents of a <i>flex container</i> consists of zero or more <dfn export title="flex item" id="flex-item">flex items</dfn>:
+		The contents of a <i>flex container</i> consists of zero or more <i>flex items</i>:
 		each in-flow child of a <i>flex container</i>
 		becomes a <i>flex item</i>,
 		and each contiguous run of text that is directly contained inside a <i>flex container</i>