[css-grid-1] Clarify cases where the minimum contribution derives from the minimum size rather than the min-content contribution. #3612

Author: fantasai

css-grid-1/Overview.bs

@@ -4010,8 +4010,9 @@ Resolve Intrinsic Track Sizes</h3>
 					('min-width' or 'min-height', whichever matches the relevant axis)
 					as its <a>preferred size</a>
 					('width' or 'height', whichever matches the relevant axis)
-					if its computed <a>preferred size</a> [=behaves as auto=],
-					or else the item’s <a>min-content contribution</a> otherwise.
+					if its computed <a>preferred size</a> [=behaves as auto=]
+					or depends on the size of the container in the relevant axis;
+					else is the item’s <a>min-content contribution</a>.
 					Because the <a>minimum size</a> often depends
 					on the size of the item’s content,
 					it is considered a type of <a>intrinsic size contribution</a>.
@@ -4820,6 +4821,26 @@ Clarifications</h4>
 						if there are no such tracks, then all affected tracks.
 				</ul>
 			</blockquote>
+		<li id="change-2017-minimum-contribution-auto">
+			Clarify the cases where the minimum contribution
+			is taken from the minimum size.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/3612">Issue 3612</a>)
+			<blockquote>
+					The <dfn noexport id="min-size-contribution">minimum contribution</dfn> of an item
+					is the smallest outer size it can have.
+					Specifically, it is the outer size
+					that would result from assuming
+					the item’s used <a>minimum size</a>
+					('min-width' or 'min-height', whichever matches the relevant axis)
+					as its <a>preferred size</a>
+					('width' or 'height', whichever matches the relevant axis)
+					if its computed <a>preferred size</a> [=behaves as auto=]
+					<ins>or depends on the size of the container in the relevant axis</ins>;
+					else is the item’s <a>min-content contribution</a>.
+					Because the <a>minimum size</a> often depends
+					on the size of the item’s content,
+					it is considered a type of <a>intrinsic size contribution</a>.
+			</blockquote>
 	</ul>
 
 <h3 id="changes-2016">