Add selectors4.vim and test

test/test.html

@@ -331,44 +331,54 @@
         ruby-position: ruby-base-container;
       }
 
-      .selectors:not([DISABLED]),
-      .selectors:matches(:hover, :focus),
-      .selectors:any-link,
-      .selectors:local-link,
-      .selectors:local-link(0),
-      .selectors:target,
-      .selectors:scope,
-      .selectors:current,
-      .selectors:current(p, li, dt, dd),
-      .selectors:past,
-      .selectors:future,
-      .selectors:enabled,
-      .selectors:disabled,
-      .selectors:checked,
-      .selectors:indeterminate,
-      .selectors:default,
-      .selecors:in-range,
-      .selectors:out-of-range,
-      .selectors:required,
-      .selectors:optional,
-      .selectors:read-only,
-      .selectors:read-write,
-      .selectors:root,
-      .selectors:empty,
-      .selectors:nth-child(2n+1),
-      .selectors:last-child,
-      .selectors:nth-last-child(-n+2),
-      .selectors:only-child,
-      .selectors:first-of-type,
-      .selectors:nth-of-type(2n+1),
-      .selectors:last-of-type,
-      .selectors:nth-last-of-type(n+2),
-      .selectors:only-of-type,
-      .selectors:nth-match(2n+1),
-      .selectors:nth-last-match(-n+2),
-      .selectors:column(p, li, dt, dd),
-      .selectors:nth-column(2n+1),
-      .selectors:nth-last-column(-n+2) {
+      .selectors3:not([DISABLED]),
+      .selectors3:matches(:hover, :focus),
+      .selectors3:any-link,
+      .selectors3:local-link,
+      .selectors3:local-link(0),
+      .selectors3:target,
+      .selectors3:scope,
+      .selectors3:current,
+      .selectors3:current(p, li, dt, dd),
+      .selectors3:past,
+      .selectors3:future,
+      .selectors3:enabled,
+      .selectors3:disabled,
+      .selectors3:checked,
+      .selectors3:indeterminate,
+      .selectors3:default,
+      .selectors3:in-range,
+      .selectors3:out-of-range,
+      .selectors3:required,
+      .selectors3:optional,
+      .selectors3:read-only,
+      .selectors3:read-write,
+      .selectors3:root,
+      .selectors3:empty,
+      .selectors3:nth-child(2n+1),
+      .selectors3:last-child,
+      .selectors3:nth-last-child(-n+2),
+      .selectors3:only-child,
+      .selectors3:first-of-type,
+      .selectors3:nth-of-type(2n+1),
+      .selectors3:last-of-type,
+      .selectors3:nth-last-of-type(n+2),
+      .selectors3:only-of-type,
+      .selectors3:nth-match(2n+1),
+      .selectors3:nth-last-match(-n+2),
+      .selectors3:column(p, li, dt, dd),
+      .selectors3:nth-column(2n+1),
+      .selectors3:nth-last-column(-n+2) {
+        display: auto;
+      }
+
+      foo | h1,
+      .selectors4:dir(ltr),
+      .selectors4:active-drop-target,
+      .selectors4:valid-drop-target,
+      .selectors4:invalid-drop-target,
+      .selectors4:placeholder-shown,
+      .selectors4:user-error {
         display: auto;
       }