Re: Explain a bit more on how to configure language server in Eglot's manual

[Michael Eliachevitch]

I suggest to also mention in the manual that json arrays should be represented
as vectors in square brackets.

I initially set an array variable as a simple lisp and got an error that the
first element is not a symbol, because it was interpreted as a plist key. This
took me a bit time to figure out and I didn't find it in the manual (if my
version is the up-to-date one). Just from saying that the json is represented
as a plist it's not clear to me that arrays are must be lisp
vectors, even though in hindsight it makes sense.

This came up in my TeXLab configuration for the :args parameter for the 
executable:

   (:texlab
       :build (:executable "latexmk"
                  :args ["-interaction=nonstopmode" "-f" "-output-directory=./build" 
"%f"]))

Other than that, I found the new documentation very clear, thanks a lot for 
that!