Add newline in PRE tests

Author: sirreal

tests/phpunit/tests/html-api/wpHtmlTemplate.php

@@ -749,10 +749,27 @@ public static function data_pre_element_leading_newline() {
 				"<pre>line1\nline2</pre>",
 			),
 
+			/*
+			 * This may seem wrong, but the template is processed like HTML. The leading newline
+			 * is removed.
+			 * The newline inside the replacement is rendered as HTML and is also removed.
+			 *
+			 * The correct way to do this for a PRE tag is:
+			 * - Leading newline in template is irrelevant.
+			 * - Replacement must include an extra newline to lead with a newline in the output.
+			 *
+			 * See the next case.
+			 */
 			'PRE with newline and newline in replacement' => array(
 				"<pre>\n</%code></pre>",
-				array( 'code' =>    "\nline1\nline2"),
-				"<pre>\nline1\nline2</pre>",
+				array( 'code' => "\nline1\nline2" ),
+				"<pre>\n\nline1\nline2</pre>",
+			),
+
+			'PRE with newline and double-newline in replacement' => array(
+				"<pre>\n</%code></pre>",
+				array( 'code' => "\nline1\nline2" ),
+				"<pre>\n\nline1\nline2</pre>",
 			),
 		);
 	}