Accept implicit _, implicit (x: Int) in lambdas, like Scala 3 does

[som-snytt]

Bring syntax in line with Scala 3 by enabling what you might already expect to work. The goal is to improve cross-building as noted at scala/scala3#14365.

Follow-up to scala/bug#3672

[SethTisue]

@som-snytt PR title says "update spec", but I see parser changes. is it refactoring/cleanup? or did the behavior change?

[SethTisue]

I'm also unclear on the exact relationship between this and #10320? Are they conceptually part of the same change, or is this one mergeable even if the other one is delayed, or what?

[som-snytt]

@SethTisue the other PR deprecates lack of parens; this PR accepts more parens (!) which should not break anything and helps cross-compiling with dotty.

[som-snytt]

Squash and rebase.

[som-snytt]

Just when you think it couldn't get interesting, the Travis failure is not the spec build.

It says ENV is 8

17964.3 tests (junit, scalacheck, et al) | ADOPTOPENJDK=8

but

openjdk version "11.0.15.1" 2022-04-22 LTS

[lrytz]

IIUC, that's the default Java version before we switch using sdkman. If you open the sdkman section (https://app.travis-ci.com/github/scala/scala/jobs/598130110 line 235) you see another java -version. https://github.com/scala/scala-dev/blob/scala-dev/travis/default.yml

[som-snytt]

@lrytz thanks I will look my time tomorrow (here it is still yesterday). As I wrote to Seth, I hope not to waste your time with Scala 2 PRs you are not paid to review.

[lrytz]

Not at all, you're rather doing our our job for us :)