Restructure test files (#10415)

tests/format/html/comments/conditional.html

@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<html>
+  <body>
+
+    <!--[if IE 5]>This is IE 5<br><![endif]-->
+    <!--[if IE 6]>This is IE 6<br><![endif]-->
+    <!--[if IE 7]>This is IE 7<br><![endif]-->
+    <!--[if IE 8]>This is IE 8<br><![endif]-->
+    <!--[if IE 9]>This is IE 9<br><![endif]-->
+
+  </body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html lang="zh-CN"><![endif]-->
+<html lang="zh-CN">
+  <head></head>
+  <body></body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html lang="zh-CN"><div><![endif]-->
+<html lang="zh-CN">
+  <head></head>
+  <body></body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html lang="zh-CN"><div></div><![endif]-->
+<html lang="zh-CN">
+  <head></head>
+  <body></body>
+</html>
+
+<body width="100%" align="center">
+  <center  >                                        
+    <!--[if (gte mso 9)|(IE)]><table cellpadding="0" cellspacing="0" border="0" width="600" align="center"><tr><td><![endif]-->
+    <div>  </div>
+    <!--[if (gte mso 9)|(IE)]></td></tr></table><![endif]-->
+  </center  >
+</body>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html class="legacy-ie"><![endif]-->
+<!--[if gte IE 9]><!--><html><!--<![endif]-->
+  <head></head>
+  <body></body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html class="legacy-ie"><![endif]-->
+<!--[if gte IE 9]><!--><html hello><!--<![endif]-->
+  <head></head>
+  <body></body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html class="legacy-ie"><head><![endif]-->
+<!--[if gte IE 9]><!--><html><head><!--<![endif]-->
+  </head>
+  <body></body>
+</html>
+
+<!DOCTYPE html>
+<!--[if lt IE 9]><html class="legacy-ie"><![endif]-->
+<!--[if gte IE 9
+]><!--><html><!--<![endif]-->
+  <head></head>
+  <body></body>
+</html>