build(aio): move attribute utils to helpers folder

This allows these utility functions to be reused across packages.

aio/tools/transforms/examples-package/processors/collect-examples.js

@@ -1,5 +1,5 @@
 const {extname} = require('canonical-path');
-const {mapObject} = require('../utils');
+const {mapObject} = require('../../helpers/utils');
 
 module.exports = function collectExamples(exampleMap, regionParser, log, createDocMessage) {
   return {

aio/tools/transforms/examples-package/processors/render-examples.js

@@ -1,4 +1,4 @@
-const { parseAttributes } = require('../utils');
+const { parseAttributes, renderAttributes } = require('../../helpers/utils');
 
 /**
  * Search the renderedContent looking for code examples that have a path (and optionally a region) attribute.
@@ -17,8 +17,7 @@ module.exports = function renderExamples(getExampleRegion) {
             if (attrMap.path) {
               // We found a path attribute so look up the example and rebuild the HTML
               const exampleContent = getExampleRegion(doc, attrMap.path, attrMap.region);
-              attributes = Object.keys(attrMap).map(key => ` ${key}="${attrMap[key].replace(/"/g, '"')}"`).join('');
+              return `<${element}${renderAttributes(attrMap)}>\n${exampleContent}\n</${element}>`;
-              return `<${element}${attributes}>\n${exampleContent}\n</${element}>`;
             }
             // No path attribute so just ignore this one
             return original;

aio/tools/transforms/examples-package/services/region-parser.js

@@ -4,7 +4,7 @@ const inlineC = require('./region-matchers/inline-c');
 const inlineCOnly = require('./region-matchers/inline-c-only');
 const inlineHash = require('./region-matchers/inline-hash');
 const DEFAULT_PLASTER = '. . .';
-const {mapObject} = require('../utils');
+const {mapObject} = require('../../helpers/utils');
 
 module.exports = function regionParser() {
   return regionParserImpl;

aio/tools/transforms/helpers/utils.js

@@ -89,5 +89,9 @@ module.exports = {
     }
 
     return attrMap;
+  },
+
+  renderAttributes(attrMap) {
+    return Object.keys(attrMap).map(key => ` ${key}="${attrMap[key].replace(/"/g, '"')}"`).join('');
   }
 };