Fix TitleBlock test

It seems like the implementation of the extension was rather sloppy and
didn't adhere to the style common to the rest of Blackfriday.

block_test.go

@@ -1503,8 +1503,8 @@ func TestTitleBlock_EXTENSION_TITLEBLOCK(t *testing.T) {
 		"<h1 class=\"title\">" +
 			"Some title\n" +
 			"Another title line\n" +
-			"Yep, more here too\n" +
-			"</h1>",
+			"Yep, more here too" +
+			"</h1>\n",
 	}
 	doTestsBlock(t, tests, Titleblock)
 }