Revert "Fixes prettier#5"

This reverts commit f230921. Reverting since, including a new expression on the tagPattern regex changes indexes used by `parse` function breaking some of the parsing. This was breaking the `leaf` tests only apparently. Needs more careful inclusion to not break some of the other use cases.

src/parse.js

@@ -8,9 +8,8 @@ const endTagPattern = `((\\/)${tagNamePattern}\\s*>)`;
 
 const commentPattern = "(!--)([\\s\\S\\n]*?)-->";
 const declPattern = "((\\?xml)(-model)?)(.+)\\?>";
-const docTypePattern = "(!(doctype|DOCTYPE))";
 
-const tagPattern = `<(${cDataPattern}|${startTagPattern}|${endTagPattern}|${commentPattern}|${declPattern}|${docTypePattern})([^<]*)`;
+const tagPattern = `<(${cDataPattern}|${startTagPattern}|${endTagPattern}|${commentPattern}|${declPattern})([^<]*)`;
 
 class XMLNode {
   constructor(tagname, opts) {
@@ -73,16 +72,6 @@ const parse = (text, _parsers, _opts) => {
           locEnd: tag.index + tag[0].trim().length
         })
       );
-    } else if ((tag[21] || "").toLowerCase() === "doctype") {
-      node.children.push(
-        new XMLNode(`!doctype`, {
-          parent: node,
-          value: tag[0].trim(),
-          attrs: tag[22].trim().replace(/>$/, ""),
-          locStart: tag.index,
-          locEnd: tag.index + tag[0].trim().length
-        })
-      );
     } else if (tag[4] === "]]>") {
       node.children.push(
         new XMLNode("!cdata", {

src/print.js

@@ -47,7 +47,7 @@ const genericPrint = (path, opts, print) => {
     return concat([join(hardline, path.map(print, "children")), hardline]);
   }
 
-  if (tagname === "!comment" || tagname === "!doctype") {
+  if (tagname === "!comment") {
     return group(concat([value]));
   }
 

test/doctype.test.js

@@ -5,9 +5,6 @@ describe("doctype", () => {
     const content = here(`
       <?xml version="1.0" encoding="UTF-8" ?>
       <?xml-model href="model.rnc" type="application/relax-ng-compact-sync-syntax" ?>
-      <!DOCTYPE foo PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
-                               "http://docbook.org/xml/4.5/docbookx.dtd">
-      <!DOCTYPE foo PUBLIC "-//OASIS//DTD DITA Task//EN" "foo.dtd">
       <foo />
     `);