Cleanup npm link creation.

lib/main/build-doc.js

@@ -23,28 +23,40 @@ var config = {
   },
   'github': {
     'style': 'github',
-    'sublinks': [
+    'sublinks': [npmLink('Ⓝ', 'See the npm package')]
-      '<% if (name == "templateSettings" || !/^(?:methods|properties|seq)$/i.test(category)) {' +
-      'print("[&#x24C3;](https://www.npmjs.com/package/lodash." + name.toLowerCase() + " \\"See the npm package\\")")' +
-      '} %>'
-    ]
   },
   'site': {
     'entryLink': '<a href="${entryHref}" class="fa fa-link"></a>',
     'sourceLink': '[source](${sourceHref})',
     'tocHref': '',
     'tocLink': '',
-    'sublinks': [
+    'sublinks': [npmLink('npm package')]
-      '<% if (name == "templateSettings" || !/^(?:methods|properties|seq)$/i.test(category)) {' +
-      'print("[npm package](https://www.npmjs.com/package/lodash." + name.toLowerCase() + ")")' +
-      '} %>'
-    ]
   }
 };
 
+/**
+ * Composes a npm link from `text` and optional `title`.
+ *
+ * @private
+ * @param {string} text The link text.
+ * @param {string} [title] The link title.
+ * @returns {string} Returns the composed npm link.
+ */
+function npmLink(text, title) {
+  return (
+    '<% if (name == "templateSettings" || !/^(?:methods|properties|seq)$/i.test(category)) {' +
+      'print(' +
+        '"[' + text + '](https://www.npmjs.com/package/lodash." + name.toLowerCase() + ' +
+        '"' + (title == null ? '' : ' \\"' + title + '\\"') + ')"' +
+      ');' +
+    '} %>'
+  );
+}
+
 /**
  * Post-process `markdown` to make adjustments.
  *
+ * @private
  * @param {string} markdown The markdown to process.
  * @returns {string} Returns the processed markdown.
  */
@@ -58,6 +70,7 @@ function postprocess(markdown) {
 /**
  * Creates the documentation markdown formatted for 'github' or 'site'.
  *
+ * @private
  * @param {string} type The format type.
  */
 function build(type) {