Router: handle parameter indent.fewerBraces

[kitbellew]

Now that dotty compiler supports indented fewer-braces chains since v3.3.1-RC1, let's implement this formatting. For #3489.

[tgodzik]

LGTM!

[xerial]

@kitbellew It looks like a bug introduced with this change that fails to insert a new line after extension method:

For example:

    given IntervalLike[MyClass] with
      extension (a: MyClass)
        def start: Long = a.createdAt
        def end: Long   = a.endAt

This code will be formatted as follows:

    given IntervalLike[MyClass] with
      extension (a: MyClass) def start: Long = a.createdAt   //  causes compilation error with missing new line
      def end: Long                          = a.endAt

[kitbellew]

@xerial thank you for reporting, could you perhaps create a separate issue next time?

as to this example, the bug was indeed introduced in the latest version but not via this change, it came from scalameta. someone has also reported it, and the fix will be in the next version.

[xerial]

Thanks. Will do. I was overwhelmed by the number of items I need to fill in the issue template 😅