Several fixes related to GOPRIVATE handling and links:
+ In Go source, fix links matching GOPRIVATE for external modules.
Previously, in these cases we'd try to match <mod>@v1.2.3/<suffix>,
which wasn't the correct input into the GOPRIVATE matching algorithm.
+ Similarly check GOPRIVATE for go.mod require statement hovers.
+ Likewise, for documentLink requests (both mod and source).
+ Move the existing hover regtest to link_test.go, and expand to cover
all these cases.
Along the way, I encountered a couple apparent bugs, which I fixed:
+ Correctly handle the case where there is only one require in a go.mod
file. This was exercised by the regtest, so took some debugging.
+ Only format links [like](this) if the requested format is actually
markdown.
Fixesgolang/go#36998
Change-Id: I92011821f646f2a7449dcca619483f83bdeb54b0
Reviewed-on: https://go-review.googlesource.com/c/tools/+/238029
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
