Language Server Protocol
The Language Server Protocol is now available through its own website. The website contains information about how the protocol works, a better readable specification, and documents about protocol implementations.
If you are interested in fixing issues like typos you can either file an issue or provide a pull request containing the changes to the specification file.
When proposing an extension to the specification, then please refer to the How to Contribute to the Language Server Protocol document.
The Language Server Protocol
See the Web site