Go 1.19 introduced new formatting for doc comments, and a new package
for processing them. This change uses the new package when gopls is
compiled with go 1.19 or later.
The difficulty is with the hover tests, which have to work both when
gopls is compiled with earlier versions of go, and with go 1.19.
Fortunately the changes in formatting the test cases are easily checked.
Fixesgolang/go#54260
Change-Id: I9e8e7f0cf3392afa0865b5d3f4e5fcdd88dfe75f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/421502
Run-TryBot: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>