Add comments to default introduction chapter code

Fixes #388

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/parse/summary.js b/lib/parse/summary.js
index 7a65532..21eadd1 100644
--- a/lib/parse/summary.js
+++ b/lib/parse/summary.js
@@ -102,6 +102,7 @@ function parseChapter(nodes, nums) {
 function defaultChapterList(chapterList) {
     var first = _.first(chapterList);
 
+    // Check if introduction node was specified in SUMMARY.md
     if (first) {
         var chapter = parseChapter(first, [0]);
 
@@ -111,6 +112,7 @@ function defaultChapterList(chapterList) {
         }
     }
 
+    // It wasn't specified, so add in default
     return [
         [ { type: 'text', text: '[Introduction](README.md)' } ]
     ].concat(chapterList);