added an illustration of flex-line-pack

Author: alexmog1

css3-flexbox/Overview.src.html

@@ -900,7 +900,10 @@ <h3 id='flex-line-pack'>
 
 	<p class='note'>Note: Only <i>multi-line</i> flexboxes ever have free space in the <i>cross axis</i> for lines to be aligned in, because in a <i>single-line</i> flexbox the sole line automatically stretches to fill the space.</p>
 
-	<p class="issue">TODO: examples</p>
+	<div class="figure">
+		<img src="images/flex-line-pack-example.png" width=585 height=514>
+		<p class='caption'>An illustration of the 'flex-line-pack' keywords and their effects on a multi-line flexbox.</p>
+	</div>
 
 
 <h2 id='layout-algorithm'>