Error when using files from root and from docs folder

[dfl-aeb]

First thanks for your great plugin and all the work you put into it.

We're experiencing a problem when using files from the root dir like the README.md and files from the docs dir like docs/test.md.

Our folder structure looks like this:

├── README.md
├── CHANGELOG.md
├── docs
│   └── test.md
└── mkdocs.yml

The mkdocs.yml looks like this:

edit_uri: edit/main

nav:
  - Home: README.md 
  - Changelog: CHANGELOG.md
  - Test: docs/test.md

plugins:
  - simple:
      folders: ["docs/**", "./CHANGELOG.md", "./README.md"]
      merge_docs_dir: false

We needed to set merge_docs_dir to false to be able to specify the test docs like this docs/test.md in the nav section. This was the only way we could get the edit_uri to work properly (if there is another way please let me know).

By setting merge_docs_dir to false the docs get rendered correctly and the edit_uri works as expected. The problem is now, that mkdocs prints out this info message during the build:

INFO    -  The following pages exist in the docs directory, but are not included in the "nav" configuration:
             - docs/test.md

- The plugin copies the README and the CHANGELOG additionaly into the docs dir, which is not necessary because it's already in the root dir. (My bad, I had copied the README and CHANGELOG into the docs folder)

• I don't understand whys mkdocs thinks that the docs/test.md is not included in the nav section. It is included and it gets rendered correctly. I assume it has something to do with the docs_dir that the simple plugin is setting?!

This is a bit confusing for our users. Is there a way to fix this?

[athackst]

Hello!

Thank you for the detailed issue. Let me see if I can reproduce and I'll get back to you.

[athackst]

It looks like the main issue was that you'd copied the README and CHANGELOG into the docs folder and that's fixed now?

I don't see the error " docs/test.md is not included in the nav section " when I run this setup locally.

Also, feel free to comment on mkdocs/mkdocs#3450 if that works for you!

[dfl-aeb]

Thanks for your quick reply. I have managed to resolve the issue. It seems that the main issue was that I copied the files into the wrong place.
I still get the error for the docs/test.md but only in one specific repository. I could also not reproduce the error in a new repository. I will try to find out what it is and will report back here.