[css-grid] Use definite minimum sizes to set the repetition number above one.

Author: fantasai

css-grid/Overview.bs

@@ -1195,15 +1195,14 @@ Repeating Rows and Columns: the ''repeat()'' notation</h4>
 	the name lists are merged.
 	For example, ''repeat(2, [a] 1fr [b])'' is equivalent to ''[a] 1fr [b a] 1fr [b]''.
 
-<h5 id="repeat-auto">
-Repeat-to-fill</h5>
-
 	When <dfn for="repeat()">''auto-fill''</dfn> is given as the repetition number,
 	if the <a>grid container</a> has a <a>definite</a> size or max size in the relevant axis,
 	then the number of repetitions is the largest possible positive integer
 	that does not cause the <a>grid</a> to overflow its <a>grid container</a>
 	(treating each track as its <a>max track sizing function</a> if that is <a>definite</a>
 	or as its minimum track sizing function otherwise).
+	Otherwise, if the <a>grid container</a> has a <a>definite</a> min size in the relevant axis,
+	the number of repetitions is the largest possible positive integer that fulfills that minimum requirement.
 	Otherwise, the specified <a>track list</a> repeats only once.
 
 	The <dfn for="repeat()">''auto-fit''</dfn> keyword behaves the same as ''auto-fill'',
@@ -3656,8 +3655,9 @@ Changes</h2>
 	* Renamed <css>row-gap</css>/<css>column-gap</css> to 'grid-row-gap'/'grid-column-gap'
 		to avoid having multicol and grid share 'column-gap'.
 		This also preserves <css>grid-</css> as a prefix across these properties and their shorthand.
-	* Split ''auto'' into ''auto-fill' and ''auto-fit'' keywords for ''repeat()'' notation,
-		adjusted grammar to prevent 
+	* Split ''auto'' into ''auto-fill'' and ''auto-fit'' keywords for ''repeat()'' notation,
+		adjusted grammar to guarantee a definite number of repetitions,
+		and allowed minimum sizes to increase the number of repetitions past one to fulfill the minimum.
 
 	The following significant changes were made since the
 	<a href=http://www.w3.org/TR/2015/WD-css-grid-1-20150317/>17 March 2015 Working Draft</a>.