Polishing.

Tweak documentation, add since tags. Reformat code, change space indents to tab indents.

See #4911
Original pull request: #4912

spring-data-mongodb/src/main/kotlin/org/springframework/data/mongodb/core/BulkOperationsExtensions.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2025 the original author or authors.
+ * Copyright 2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,30 +21,32 @@ import org.springframework.data.mongodb.core.query.UpdateDefinition
 import org.springframework.data.util.Pair.of
 
 /**
- * Extension for [BulkOperations.updateMulti] that converts a [kotlin.Pair] to [org.springframework.data.util.Pair].
+ * Extension for [BulkOperations.updateMulti] that converts a list of [kotlin.Pair] to list of [org.springframework.data.util.Pair].
  *
  * @author 2tsumo-hitori
+ * @since 4.5
  */
 fun BulkOperations.updateMulti(kotlinPairs: List<Pair<Query, UpdateDefinition>>): BulkOperations =
 	updateMulti(kotlinPairs.toSpringPairs())
 
 /**
- * Extension for [BulkOperations.upsert] that converts a [kotlin.Pair] to [org.springframework.data.util.Pair].
+ * Extension for [BulkOperations.upsert] that converts a list of [kotlin.Pair] to list of [org.springframework.data.util.Pair].
  *
  * @author 2tsumo-hitori
+ * @since 4.5
  */
-fun BulkOperations.upsert(kotlinPairs: List<Pair<Query, Update>>) : BulkOperations =
+fun BulkOperations.upsert(kotlinPairs: List<Pair<Query, Update>>): BulkOperations =
 	upsert(kotlinPairs.toSpringPairs())
 
 /**
  * Extension for [BulkOperations.updateOne] that converts a [kotlin.Pair] to [org.springframework.data.util.Pair].
  *
  * @author 2tsumo-hitori
+ * @since 4.5
  */
 fun BulkOperations.updateOne(kotlinPairs: List<Pair<Query, UpdateDefinition>>): BulkOperations =
 	updateOne(kotlinPairs.toSpringPairs())
 
 private fun <A : Query, B : UpdateDefinition> List<Pair<A, B>>.toSpringPairs(): List<org.springframework.data.util.Pair<A, B>> {
-
 	return map { (first, second) -> of(first, second) }
 }

spring-data-mongodb/src/test/kotlin/org/springframework/data/mongodb/core/BulkOperationExtensionsTests.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2025 the original author or authors.
+ * Copyright 2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@ package org.springframework.data.mongodb.core
 
 import io.mockk.mockk
 import io.mockk.verify
-import org.junit.Test
+import org.junit.jupiter.api.Test
 import org.springframework.data.mongodb.core.query.Criteria
 import org.springframework.data.mongodb.core.query.Query
 import org.springframework.data.mongodb.core.query.Update
@@ -25,6 +25,7 @@ import org.springframework.data.mongodb.core.query.UpdateDefinition
 import org.springframework.data.util.Pair.of
 
 /**
+ * Unit tests for BulkOperationExtensions.
  * @author 2tsumo-hitori
  */
 class BulkOperationExtensionsTests {
@@ -32,8 +33,9 @@ class BulkOperationExtensionsTests {
 	private val bulkOperation = mockk<BulkOperations>(relaxed = true)
 
 	@Test // GH-4911
-    fun `BulkOperation#updateMulti#updates() using kotlin#Pair should call its Java counterpart`() {
+	fun `BulkOperation#updateMulti using kotlin#Pair should call its Java counterpart`() {
-        val list : MutableList<Pair<Query, UpdateDefinition>> = mutableListOf()
+
+		val list: MutableList<Pair<Query, UpdateDefinition>> = mutableListOf()
 		list.add(where("value", "v2") to set("value", "v3"))
 
 		bulkOperation.updateMulti(list)
@@ -43,8 +45,9 @@ class BulkOperationExtensionsTests {
 	}
 
 	@Test // GH-4911
-    fun `BulkOperation#upsert#updates() using kotlin#Pair should call its Java counterpart`() {
+	fun `BulkOperation#upsert using kotlin#Pair should call its Java counterpart`() {
-        val list : MutableList<Pair<Query, Update>> = mutableListOf()
+
+		val list: MutableList<Pair<Query, Update>> = mutableListOf()
 		list.add(where("value", "v2") to set("value", "v3"))
 
 		bulkOperation.upsert(list)
@@ -54,8 +57,9 @@ class BulkOperationExtensionsTests {
 	}
 
 	@Test // GH-4911
-    fun `BulkOperation#updateOne#updates() using kotlin#Pair should call its Java counterpart`() {
+	fun `BulkOperation#updateOne using kotlin#Pair should call its Java counterpart`() {
-        val list : MutableList<Pair<Query, UpdateDefinition>> = mutableListOf()
+
+		val list: MutableList<Pair<Query, UpdateDefinition>> = mutableListOf()
 		list.add(where("value", "v2") to set("value", "v3"))
 
 		bulkOperation.updateOne(list)
@@ -71,4 +75,5 @@ class BulkOperationExtensionsTests {
 	private fun set(field: String, value: String): Update {
 		return Update().set(field, value)
 	}
+
 }