Bad Commit resulting in drastic changes

[RK311y]

Overview

Description of the problem

The following commit had many, many, errors...

c13414f

Errors

Error 1

Error Messages

_toc.yml
WARNING: Unknown file in toc: development/addon-development-overview

Solution

This is simply missing the file extension: .md (here)

Error 2

The Shared Form documentation was removed:

See: #L421-422