sbt compile keeps reformatting some Java sources

Hello,

I’m trying to compile Akka on my workspace PC using IntelliJ, trying to figure out whole setup so I can contribute productively. I had to work around some issues with IntelliJ’s build process, fell back to compiling builds with sbt shell, which is basically sbt running in a terminal. Issue is that whenever I recompile some Java sources get formatted and I can’t figure out why. Reformatting gets logged in terminal, it also adds some paragraphs and new lines into comment sections. Tried running sbt compile from terminal too, same result. What could be the issue?

Environment: Windows 10 IntelliJ 2020.1 sbt 1.3.10

Commit: https://github.com/akka/akka/tree/6361bdb1533b6a180926e1eb3bfc8adf5ff79a84

List of files that get modified during compile: modified: akka-actor-tests/src/test/java/akka/dispatch/JavaFutureTests.java modified: akka-actor/src/main/java/akka/dispatch/AbstractBoundedNodeQueue.java modified: akka-actor/src/main/java/akka/dispatch/AbstractMailbox.java modified: akka-actor/src/main/java/akka/dispatch/AbstractMessageDispatcher.java modified: akka-actor/src/main/java/akka/dispatch/AbstractNodeQueue.java modified: akka-cluster-metrics/src/main/java/akka/cluster/metrics/protobuf/msg/ClusterMetricsMessages.java modified: akka-cluster-sharding-typed/src/main/java/akka/cluster/sharding/typed/internal/protobuf/ShardingMessages.java modified: akka-cluster-sharding/src/main/java/akka/cluster/sharding/protobuf/msg/ClusterShardingMessages.java modified: akka-cluster-tools/src/main/java/akka/cluster/client/protobuf/msg/ClusterClientMessages.java modified: akka-cluster-tools/src/main/java/akka/cluster/pubsub/protobuf/msg/DistributedPubSubMessages.java modified: akka-cluster-typed/src/main/java/akka/cluster/typed/internal/protobuf/ClusterMessages.java modified: akka-cluster-typed/src/main/java/akka/cluster/typed/internal/protobuf/ReliableDelivery.java modified: akka-cluster/src/main/java/akka/cluster/protobuf/msg/ClusterMessages.java modified: akka-distributed-data/src/main/java/akka/cluster/ddata/protobuf/msg/ReplicatedDataMessages.java modified: akka-distributed-data/src/main/java/akka/cluster/ddata/protobuf/msg/ReplicatorMessages.java modified: akka-docs/src/main/java/docs/ddata/protobuf/msg/TwoPhaseSetMessages.java modified: akka-docs/src/main/java/docs/persistence/proto/FlightAppModels.java modified: akka-multi-node-testkit/src/main/java/akka/remote/testconductor/TestConductorProtocol.java modified: akka-persistence/src/main/java/akka/persistence/serialization/MessageFormats.java modified: akka-protobuf/src/main/java/akka/protobuf/AbstractMessage.java modified: akka-protobuf/src/main/java/akka/protobuf/AbstractMessageLite.java modified: akka-protobuf/src/main/java/akka/protobuf/AbstractParser.java modified: akka-protobuf/src/main/java/akka/protobuf/BlockingRpcChannel.java modified: akka-protobuf/src/main/java/akka/protobuf/BlockingService.java modified: akka-protobuf/src/main/java/akka/protobuf/BoundedByteString.java modified: akka-protobuf/src/main/java/akka/protobuf/ByteString.java modified: akka-protobuf/src/main/java/akka/protobuf/CodedInputStream.java modified: akka-protobuf/src/main/java/akka/protobuf/CodedOutputStream.java modified: akka-protobuf/src/main/java/akka/protobuf/DescriptorProtos.java modified: akka-protobuf/src/main/java/akka/protobuf/Descriptors.java modified: akka-protobuf/src/main/java/akka/protobuf/DynamicMessage.java modified: akka-protobuf/src/main/java/akka/protobuf/ExtensionRegistry.java modified: akka-protobuf/src/main/java/akka/protobuf/ExtensionRegistryLite.java modified: akka-protobuf/src/main/java/akka/protobuf/FieldSet.java modified: akka-protobuf/src/main/java/akka/protobuf/GeneratedMessage.java modified: akka-protobuf/src/main/java/akka/protobuf/GeneratedMessageLite.java modified: akka-protobuf/src/main/java/akka/protobuf/Internal.java modified: akka-protobuf/src/main/java/akka/protobuf/InvalidProtocolBufferException.java modified: akka-protobuf/src/main/java/akka/protobuf/LazyField.java modified: akka-protobuf/src/main/java/akka/protobuf/LazyStringArrayList.java modified: akka-protobuf/src/main/java/akka/protobuf/LazyStringList.java modified: akka-protobuf/src/main/java/akka/protobuf/LiteralByteString.java modified: akka-protobuf/src/main/java/akka/protobuf/Message.java modified: akka-protobuf/src/main/java/akka/protobuf/MessageLite.java modified: akka-protobuf/src/main/java/akka/protobuf/MessageLiteOrBuilder.java modified: akka-protobuf/src/main/java/akka/protobuf/MessageOrBuilder.java modified: akka-protobuf/src/main/java/akka/protobuf/Parser.java modified: akka-protobuf/src/main/java/akka/protobuf/ProtocolMessageEnum.java modified: akka-protobuf/src/main/java/akka/protobuf/RepeatedFieldBuilder.java modified: akka-protobuf/src/main/java/akka/protobuf/RopeByteString.java modified: akka-protobuf/src/main/java/akka/protobuf/RpcCallback.java modified: akka-protobuf/src/main/java/akka/protobuf/RpcChannel.java modified: akka-protobuf/src/main/java/akka/protobuf/RpcController.java modified: akka-protobuf/src/main/java/akka/protobuf/RpcUtil.java modified: akka-protobuf/src/main/java/akka/protobuf/Service.java modified: akka-protobuf/src/main/java/akka/protobuf/SingleFieldBuilder.java modified: akka-protobuf/src/main/java/akka/protobuf/SmallSortedMap.java modified: akka-protobuf/src/main/java/akka/protobuf/TextFormat.java modified: akka-protobuf/src/main/java/akka/protobuf/UninitializedMessageException.java modified: akka-protobuf/src/main/java/akka/protobuf/UnknownFieldSet.java modified: akka-protobuf/src/main/java/akka/protobuf/UnmodifiableLazyStringList.java modified: akka-protobuf/src/main/java/akka/protobuf/Utf8.java modified: akka-protobuf/src/main/java/akka/protobuf/WireFormat.java modified: akka-remote-tests/src/test/java/akka/remote/artery/protobuf/TestMessages.java