[css-flexbox-1][editorial] Redraft content-based minimum size paragraph for more straightforwardness.

Author: fantasai

css-flexbox-1/Overview.bs

@@ -963,23 +963,23 @@ Automatic Minimum Size of Flex Items</h3>
 	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> that is not a <a>scroll container</a>
-	is a <dfn>content-based minimum size</dfn>;
+	is its [=content-based minimum size=];
 	for <a>scroll containers</a> the <a>automatic minimum size</a> is zero, as usual.
 
-	Note: The [=content-based minimum size=] is a type of [=intrinsic size contribution=],
-	and thus the provisions in [[css-sizing-3#intrinsic-contribution]] apply.
-
-	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>.
-	However, if the box [=is a replaced element=]
-	with an [=preferred aspect ratio|aspect ratio=]
-	and no <a>specified size suggestion</a>,
-	its <a>content-based minimum size</a>
-	is the smaller of its <a>content size suggestion</a> and its <a>transferred size suggestion</a>.
-	If the box has neither a <a>specified size suggestion</a> nor an [=preferred aspect ratio|aspect ratio=],
-	its <a>content-based minimum size</a> is the <a>content size suggestion</a>.
+	The <dfn>content-based minimum size</dfn> of a [=flex item=]
+	is the smaller of its [=specified size suggestion=] and its [=content size suggestion=]
+	if its [=specified size suggestion=] exists;
+	otherwise, the smaller of its [=transferred size suggestion=] and its [=content size suggestion=]
+	if the element is [=replaced element|replaced=]
+	and its [=transferred size suggestion=] exists;
+	otherwise its [=content size suggestion=].
 	In all cases, the size is clamped by the [=maximum size|maximum=] [=main size=] if it's <a>definite</a>.
 
+<!-- This differs from Grid's definition
+(which just consults the first of specified,transferred,content that exists)
+because we explicitly want to let flex items shrink to their min-content size.
+Grid doesn't have similarly meaningful shrinkability, so it doesn't need to care. -->
+
 	The <a>content size suggestion</a>, <a>specified size suggestion</a>, and <a>transferred size suggestion</a>
 	used in this calculation account for the relevant min/max/preferred size properties
 	so that the <a>content-based minimum size</a> does not interfere with any author-provided constraints,
@@ -1008,6 +1008,9 @@ Automatic Minimum Size of Flex Items</h3>
 			by any <a>definite</a> [=minimum size|minimum=] and [=maximum size|maximum=] [=cross sizes=] converted through the aspect ratio.
 	</dl>
 
+	Note: The [=content-based minimum size=] is a type of [=intrinsic size contribution=],
+	and thus the cyclic percentage provisions in [[css-sizing-3#intrinsic-contribution]] apply.
+
 	For the purpose of calculating an intrinsic size of the box
 	(e.g. the box’s <a>min-content size</a>),
 	a <a>content-based minimum size</a> causes the box’s size in that axis to become indefinite
@@ -3774,6 +3777,10 @@ Changes since the <a href="https://www.w3.org/TR/2018/CR-css-flexbox-1-20181119/
 			is a type of [=intrinsic size contribution=],
 			and thus impacted by associated rules in [[css-sizing-3]].
 			(<a href="https://github.com/w3c/csswg-drafts/issues/5665#issuecomment-738391191">Issue 5665</a>)
+
+		<li id="change-2018-content-based-editorial">
+			Redrafted the definition of [=content-based minimum size=]
+			for easier reading. (Editorial)
 	</ul>
 
 <h3 id="changes-20171016">