Allow to not cut the signature received on hover

[mattiasdrp]

Some servers (i.e. the ocamllsp one) return only the signature on hover (without the documentation) but tend to put newlines between the different items. With the current implementation of lsp-clients-extract-signature-on-hover, the displayed signature will only contain the first item

config1:string list ->
config2:string list -> config3:string list -> int -> int -> int

will then be rendered as

config1:string list ->

With the new implementation, a custom variable allows to take control over this behaviour and the function has been reimplemented to either return the previous result or return the signature with newlines replaced by spaces

[mattiasdrp]

I need to check some things, don't review it right now ;-)

[yyoncho]

you may do it like this: https://github.com/yyoncho/lsp-mode/blob/master/clients/lsp-clangd.el#L267

[mattiasdrp]

Thanks a lot @yyoncho for the pointer, that's much better for me!

[yyoncho]

Can you confirm that this is still relevant?

[mattiasdrp]

Can you confirm that this is still relevant?

Still relevant, yes, rewrote the function in my .emacs.d until this is merged :-)

[yyoncho]

Thank you for contributing to lsp-mode, and sorry for the delay.