Update regression tests in light of recent spec changes...

affecting link destinations.

Author: jgm

test/regression.txt

@@ -81,7 +81,8 @@ Issue #193 - unescaped left angle brackets in link destination
 
 [a]: <te<st>
 .
-<p><a href="%3Cte%3Cst%3E">a</a></p>
+<p>[a]</p>
+<p>[a]: &lt;te<st></p>
 ````````````````````````````````
 
 Issue #192 - escaped spaces in link destination
@@ -118,8 +119,9 @@ Issue #530 - link parsing corner cases
 )
 .
 <p>[a](\ b)</p>
-<p><a href="%3C%3Cb">a</a></p>
-<p><a href="%3Cb">a</a></p>
+<p>[a](&lt;&lt;b)</p>
+<p>[a](&lt;b
+)</p>
 ````````````````````````````````
 
 Issue commonmark#526 - unescaped ( in link title
@@ -145,3 +147,10 @@ opener.
 </style>
 ````````````````````````````````
 
+Issue #289.
+
+```````````````````````````````` example
+[a](<b) c>
+.
+<p>[a](&lt;b) c&gt;</p>
+````````````````````````````````