Label should not contain long descriptions

[tgodzik]

Describe the bug

@main
def run = 
  (1, 2).to@@

will show inserted description in the label as well as in the details.

Expected behavior

We should only have a summary in the label.

Operating system

Linux

Editor/Extension

None

Version of Metals

v1.4.1

Extra context or search terms

Raised in scalameta/metals-zed#34

[kasiaMarek]

This is how it looks like in VSCode:

We can try:

• not to dealias the type ref if it is a match type (dealiasing here seems to be done by the compiler, so it might be problematic)
• try to print it in single line in label (+ trim if too long), e.g.
  • if the type is multiline we could parse it and print with ';' where necessary
  • add option to compiler printer to print without \n

[tgodzik]

Could we do some kind of shorter description like (Int, Int) match {...} (Match Type) since it's anyway not enough room to present the whole expression?