Migrate UseExperimental->OptIn in project sources

libraries/stdlib/test/time/DurationTest.kt

@@ -3,7 +3,7 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:UseExperimental(ExperimentalTime::class)
+@file:OptIn(ExperimentalTime::class)
 package test.time
 
 import test.numbers.assertAlmostEquals
@@ -398,4 +398,4 @@ class DurationTest {
         test(Duration.INFINITE, "Infinity")
     }
 
-}
+}

libraries/stdlib/test/time/DurationUnitTest.kt

@@ -3,7 +3,7 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:UseExperimental(ExperimentalTime::class)
+@file:OptIn(ExperimentalTime::class)
 package test.time
 
 import kotlin.test.*
@@ -44,4 +44,4 @@ class DurationUnitTest {
 
 
 
-}
+}

libraries/stdlib/test/time/MeasureTimeTest.kt

@@ -3,7 +3,7 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:UseExperimental(ExperimentalTime::class)
+@file:OptIn(ExperimentalTime::class)
 package test.time
 
 import kotlin.random.Random
@@ -68,4 +68,4 @@ class MeasureTimeTest {
         assertEquals(expectedResult, result)
         assertEquals(result.nanoseconds, elapsed2)
     }
-}
+}

libraries/stdlib/test/time/TestTimeSourceTest.kt

@@ -3,7 +3,7 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-@file:UseExperimental(ExperimentalTime::class)
+@file:OptIn(ExperimentalTime::class)
 package test.time
 
 import kotlin.test.*
@@ -59,4 +59,4 @@ class TestTimeSourceTest {
         timeSource += 1.9.nanoseconds
         assertEquals(1.nanoseconds, mark.elapsedNow())
     }
-}
+}

libraries/stdlib/test/time/TimeMarkTest.kt

@@ -2,7 +2,8 @@
  * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
-@file:UseExperimental(ExperimentalTime::class)
+
+@file:OptIn(ExperimentalTime::class)
 package test.time
 
 import kotlin.test.*
@@ -50,4 +51,4 @@ class TimeMarkTest {
         markPast1.assertHasPassed(true)
 
     }
-}
+}