Formatting: Add an extra line break before block elements in wpautop().

`wpautop()` considers double line breaks to be the separator between block level HTML elements. By adding two line breaks before a block element, this allows us to process the text before a block element correctly.

Fixes #4857.



git-svn-id: https://develop.svn.wordpress.org/trunk@38592 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/formatting/Autop.php

@@ -524,4 +524,14 @@ line 2<br/>
 		$this->assertEquals( $expected, trim( wpautop( $content ) ) );
 	}
 
+
+	/**
+	 * @ticket 4857
+	 */
+	function test_that_text_before_blocks_is_peed() {
+		$content = 'a<div>b</div>';
+		$expected = "<p>a</p>\n<div>b</div>";
+
+		$this->assertEquals( $expected, trim( wpautop( $content ) ) );
+	}
 }