Implement SIP-77: End Markers for Method Blocks

[soronpo]

Implements scala/improvement-proposals#116

[bishabosha]

there is already an existing WithEndMarker trait that implements this behavior

[soronpo]

Are the tests in the main branch supposed to be working correctly? These changes were fine locally for 3.7.4, but I can't get the main branch to test successfully even without any modifications.

[hamzaremmal]

@soronpo I haven't checked why this PR doesn't pass in details as I'm on my phone, but from the diff, I would say that you need to add the object in scala.Predef, not just stdlibPatches.
And to answer your question, of course the tests are supposed to work correctly :).

[bishabosha]

[error] Test dotty.tools.pc.tests.completion.CompletionBacktickSuite.soft-keyword-ident failed: java.lang.AssertionError:
[error] expected single completion item, obtained 2 items.
[error] List(end: Int
[error] , endMarkersForMethodBlocks - scala.runtime.stdLibPatches.language.experimental
[error] )
[error] , took 0.234 sec
[info] Test run dotty.tools.pc.tests.completion.Co

@soronpo looks like your new definition adds a new completion in this test

[soronpo]

[error] Test dotty.tools.pc.tests.completion.CompletionBacktickSuite.soft-keyword-ident failed: java.lang.AssertionError:
[error] expected single completion item, obtained 2 items.
[error] List(end: Int
[error] , endMarkersForMethodBlocks - scala.runtime.stdLibPatches.language.experimental
[error] )
[error] , took 0.234 sec
[info] Test run dotty.tools.pc.tests.completion.Co

@soronpo looks like your new definition adds a new completion in this test

Blame the AI, hahaha. I'll check it out, thanks.