Fixed examples using 'text-space-trim' values (fixes #446)

Author: SebastianZ

css-text-4/Overview.bs

@@ -99,7 +99,7 @@ White Space Collapsing: the 'text-space-collapse' property</h3>
 				text-space-collapse: discard;
 			}
 			m|mi, m|mn, m|mo, m|ms, m|mtext {
-				text-space-collapse: trim-inner;
+				text-space-trim: trim-inner;
 			}
 		</pre>
 	</div>
@@ -149,7 +149,7 @@ White Space Trimming: the 'text-space-trim' property</h3>
 		<p>The following style rules render DT elements as a comma-separated list:
 		<pre>
 			dt { display: inline; }
-			dt + dt:before { content: ", "; text-space-collapse: discard-before; }
+			dt + dt:before { content: ", "; text-space-trim: discard-before; }
 		</pre>
 	</div>