[css-grid] typos

Author: tabatkins

css-grid/Overview.bs

@@ -1180,13 +1180,13 @@ Repeating Rows and Columns: the ''repeat()'' notation</h4>
 	The second argument is a <a>track list</a>,
 	which is repeated that number of times.
 
-	* The <<track-repeat>> variant can represent the repeatition of any <<track-size>>,
-		but is limited to fixed repetitions.
+	* The <<track-repeat>> variant can represent the repetition of any <<track-size>>,
+		but is limited to a fixed number of repetitions.
 	* The <<auto-repeat>> variant can repeat automatically to fill a space,
 		but requires <a>definite</a> minimum track sizes so that the number of repetitions can be calculated.
 		It can only appear once in the <a>track list</a>,
 		but the same <a>track list</a> can also contain <<fixed-repeat>>s.
-	* The <<name-repeat>> variant can be used with the ''grid-template-rows/subgrid'' keyword:
+	* The <<name-repeat>> variant can be only used with the ''grid-template-rows/subgrid'' keyword:
 		it only repeats names.
 		The ''auto-fill'' keyword is only valid once per <<line-name-list>>,
 		and repeats enough times for the name list to match the subgrid’s specified <a>grid span</a>