Configuration (required)

.scalafmt.conf:

version = "3.7.2"
maxColumn = 80

runner.dialect = scala3

spaces.afterKeywordBeforeParen = true
newlines.beforeOpenParenDefnSite = unfold

Command-line parameters (required)

When I run scalafmt via CLI like this: scalafmt test.scala

Steps

Given code like this:

extension (s: String)

  def foo(): Unit = ???
  def bar(): Unit = ???

Problem

Scalafmt formats code like this:

extension(s: String)

  def foo(): Unit = ???
  def bar(): Unit = ???

Expectation

I should like the formatted output to look like this:

extension (s: String)

  def foo(): Unit = ???
  def bar(): Unit = ???

Workaround

n/a

Notes

spaces.afterKeywordBeforeParen does not appear to be honoured for the extension soft keyword at all (whether set to true or false). Instead, it seems that a space is inserted between the extension and the following opening paren only when newlines.beforeOpenParenDefnSite = null. When newlines.beforeOpenParenDefnSite is keep, fold, or unfold, the space is removed.

Note: I always want the space and would thus be happy as long as it is added (or preserved), irrespective of the spaces.afterKeywordBeforeParen setting. At first glance, however, it seems reasonable that the behaviour should follow that setting.