tools: update marked dependency

Update module marked. Customize renderer to remove id from heading.

PR-URL: #6396
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

test/doctool/test-doctool-json.js

@@ -81,7 +81,7 @@ var testData = [
                 'added': ['v1.0.0']
               },
               'desc': '<p>Describe <code>Foobar</code> in more detail ' +
-                'here.\n\n</p>\n',
+                'here.</p>\n',
               'type': 'module',
               'displayName': 'Foobar'
             },
@@ -92,7 +92,7 @@ var testData = [
                 'added': ['v5.3.0', 'v4.2.0']
               },
               'desc': '<p>Describe <code>Foobar II</code> in more detail ' +
-                'here.\n\n</p>\n',
+                'here.</p>\n',
               'type': 'module',
               'displayName': 'Foobar II'
             },
@@ -104,15 +104,15 @@ var testData = [
                 'deprecated': ['v2.0.0']
               },
               'desc': '<p>Describe <code>Deprecated thingy</code> in more ' +
-                'detail here.\n\n</p>\n',
+                'detail here.</p>\n',
               'type': 'module',
               'displayName': 'Deprecated thingy'
             },
             {
               'textRaw': 'Something',
               'name': 'something',
-              'desc': '<!-- This is not a metadata comment -->\n\n<p>' +
-                'Describe <code>Something</code> in more detail here.\n</p>\n',
+              'desc': '<!-- This is not a metadata comment -->\n<p>' +
+                'Describe <code>Something</code> in more detail here.</p>\n',
               'type': 'module',
               'displayName': 'Something'
             }

tools/doc/html.js

@@ -9,6 +9,15 @@ const typeParser = require('./type-parser.js');
 
 module.exports = toHTML;
 
+// customized heading without id attribute
+var renderer = new marked.Renderer();
+renderer.heading = function(text, level) {
+  return '<h' + level + '>' + text + '</h' + level + '>\n';
+};
+marked.setOptions({
+  renderer: renderer
+});
+
 // TODO(chrisdickinson): never stop vomitting / fix this.
 var gtocPath = path.resolve(path.join(
   __dirname,

tools/doc/json.js

@@ -8,6 +8,15 @@ module.exports = doJSON;
 const common = require('./common.js');
 const marked = require('marked');
 
+// customized heading without id attribute
+var renderer = new marked.Renderer();
+renderer.heading = function(text, level) {
+  return '<h' + level + '>' + text + '</h' + level + '>\n';
+};
+marked.setOptions({
+  renderer: renderer
+});
+
 function doJSON(input, filename, cb) {
   var root = {source: filename};
   var stack = [root];