tests: apply official code style

#KT-38632 Fixed

j2k/testData/fileOrElement/mutableCollections/FunctionParameters.kt

@@ -2,10 +2,12 @@
 import java.util.*
 
 internal class A<T> {
-    fun foo(nonMutableCollection: Collection<String>,
-            mutableCollection: MutableCollection<String>,
-            mutableSet: MutableSet<T>,
-            mutableMap: MutableMap<String, T>) {
+    fun foo(
+        nonMutableCollection: Collection<String>,
+        mutableCollection: MutableCollection<String>,
+        mutableSet: MutableSet<T>,
+        mutableMap: MutableMap<String, T>
+    ) {
         mutableCollection.addAll(nonMutableCollection)
         mutableSet.add(mutableMap.remove("a"))
     }

j2k/testData/fileOrElement/mutableCollections/Overrides.kt

@@ -4,7 +4,10 @@ import kotlinApi.KotlinClass
 
 abstract class C(field: Int) : KotlinClass(field) {
 
-    override fun foo(mutableCollection: MutableCollection<String>, nullableCollection: Collection<Int>?): MutableList<Any> {
+    override fun foo(
+        mutableCollection: MutableCollection<String>,
+        nullableCollection: Collection<Int>?
+    ): MutableList<Any> {
         return super.foo(mutableCollection, nullableCollection)
     }
 }