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update instructions for how to use Scalafmt in IntelliJ (#26682)

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Patrik Nordwall 2019-04-05 09:30:14 +02:00 • committed by Christopher Batey
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CONTRIBUTING.md
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@ -388,8 +388,10 @@ In such situations we prefer 'internal' over 'impl' as a package name.
Akka uses [Scalafmt](https://scalameta.org/scalafmt/docs/installation.html) to enforce some of the code style rules. Akka uses [Scalafmt](https://scalameta.org/scalafmt/docs/installation.html) to enforce some of the code style rules.
When IntelliJ detects the `.scalafmt.conf` and promts "Scalafmt configuration detected in this project" you should It's recommended to enable Scalafmt formatting in IntelliJ. Use version 2019.1 or later. In
select "Continue using IntelliJ formatter" and instead install the [Scalafmt IntelliJ plugin](https://scalameta.org/scalafmt/docs/installation.html#intellij). Install the nightly plugin (until version 2.0.0 or later becomes stable) and enable "Format on save". Preferences > Editor > Code Style > Scala, select Scalafmt as formatter and enable "Reformat on file save".
IntelliJ will then use the same settings and version as defined in `.scalafmt.conf` file. Then it's
not needed to use `sbt scalafmtAll` when editing with IntelliJ.
### Java style ### Java style