[css-gaps-1][editorial] Fix typos and correct markup in examples

Author: kbabbitt

css-gaps-1/Overview.bs

@@ -283,7 +283,7 @@ Breaking gap decorations into segments: The 'column-rule-break', 'row-rule-break
 		<pre>
 			.break-intersection {
 				gap-rule-break: intersection;
-				grap-rule-outset: 0px;
+				gap-rule-outset: 0px;
 			}
 		</pre>
 		<img src="images/example-break-intersection.png">
@@ -296,7 +296,7 @@ Breaking gap decorations into segments: The 'column-rule-break', 'row-rule-break
 		<pre>
 			.break-spanning-item {
 				gap-rule-break: spanning-item;
-				grap-rule-outset: 0px;
+				gap-rule-outset: 0px;
 			}
 		</pre>
 		<img src="images/example-break-spanning-item.png">
@@ -310,7 +310,7 @@ Breaking gap decorations into segments: The 'column-rule-break', 'row-rule-break
 		<pre>
 			.break-none {
 				gap-rule-break: none;
-				grap-rule-outset: 0px;
+				gap-rule-outset: 0px;
 			}
 		</pre>
 		<img src="images/example-break-none.png">
@@ -354,6 +354,7 @@ Adjusting gap decoration endpoints: The 'column-rule-outset', 'row-rule-outset',
 		<pre>
 			.outset-0px {
 				column-rule-outset: 0px;
+				column-rule-break: intersection;
 			}
 		</pre>
 		<img src="images/example-column-outset-0px.png">
@@ -366,6 +367,7 @@ Adjusting gap decoration endpoints: The 'column-rule-outset', 'row-rule-outset',
 		<pre>
 			.outset-5px {
 				column-rule-outset: 5px;
+				column-rule-break: intersection;
 			}
 		</pre>
 		<img src="images/example-column-outset-5px.png">
@@ -379,6 +381,7 @@ Adjusting gap decoration endpoints: The 'column-rule-outset', 'row-rule-outset',
 		<pre>
 			.outset-50percent {
 				column-rule-outset: 50%;
+				column-rule-break: intersection;
 			}
 		</pre>
 		<img src="images/example-column-outset-50percent.png">
@@ -397,6 +400,7 @@ Adjusting gap decoration endpoints: The 'column-rule-outset', 'row-rule-outset',
 		<pre>
 			.outset-negative-5px {
 				column-rule-outset: -5px;
+				column-rule-break: intersection;
 			}
 		</pre>
 		<img src="images/example-column-outset-minus-5px.png">