Minor: normalize '@Test' annotation casing in all tests.

libraries/stdlib/test/collections/SequenceJVMTest.kt

@@ -1,12 +1,12 @@
 @file:kotlin.jvm.JvmVersion
 package test.collections
 
-import org.junit.Test as test
+import org.junit.Test
 import kotlin.test.assertEquals
 
 class SequenceJVMTest {
 
-    @test fun filterIsInstance() {
+    @Test fun filterIsInstance() {
         val src: Sequence<Any> = listOf(1, 2, 3.toDouble(), "abc", "cde").asSequence()
 
         val intValues: Sequence<Int> = src.filterIsInstance<Int>()