Bug Report

Current behavior
Homepage titles are redundantly printed twice. The course description also shows a screen capture where the page title Welcome to my blog is printed twice.

Reproduction
Steps to reproduce the behavior in the course:

1. Follow the course steps up to Step 4: Customize Site Details, keeping index.md beginning with a heading. For example, the default file begins with # Welcome to my blog.
2. Click the link to the published page, represented as [here]({{ deploymentUrl }}):

   github-pages/responses/03_change-theme.md

   Lines 1 to 3 in 6db77ad

   	## Step 4: Customize Site Details
   	Great work! You can see your published page [here]({{ deploymentUrl }}). If you don't see your changes right away, refresh the page.

3. See the beginning heading, e.g. Welcome to my blog, replicating itself twice.

Expected behavior
It is enough to print it just once like this:

Possible solution
Replace the default beginning heading # Welcome to my blog in index.md with a front matter like this:

-# Welcome to my blog
+---
+title: “Welcome to my blog”
+---

I’m glad you are here. I plan to talk about …

Or just delete the number sign (#) of the beginning heading to make sure that index.md do not begin with a heading.

Additionally, add an instruction like “Write your homepage title in a front matter.” or a warning like “Make sure that index.md do not begin with a heading without a page title front matter.” to responses/01_update-index.md where users update index.md.

Additional context
I found the same issue and solution here and here.

I also made a post on Github Community Forum.