.editorconfig's use of tabs instead of spaces causes eleventyNavigation to fail

[jayjansheski]

First, thanks for 11ty!

Here's an issue I'm seeing: .editorconfig was changed to use tabs instead of spaces, but that seems to cause eleventyNavigation to fail. (Tabs are forbidden in YAML.)

Here's how the issue can be reproduced:

1. git clone https://github.com/11ty/eleventy-base-blog.git
2. cd eleventy-base-blog
3. npm install
4. Add books/index.md parallel to about/index.md
5. Select and copy the contents of about/index.md to books/index.md, changing key to Books and order to 4. Optionally, change the markdown content. I'm using VSCode on macOS.

layout: layouts/base.njk
eleventyNavigation:
	key: "Books"
	order: 4
---
# Books

I am a person that reads stuff.

6. npm start and visit the site at localhost:8080; notice Books doesn't show up in the menu.

Change the tabs before key and order to spaces and it'll work fine.