Insert empty lines after functions and properties (KT-4002)

#KT-4002 Fixed

idea/testData/formatter/EmptyLineBetweenFunAndProperty.kt

@@ -0,0 +1,64 @@
+// No lines
+fun f1() {}
+val p1 = 1
+fun f2() {}
+
+fun f3() = 1
+val p2 = 1
+fun f4() = 1
+
+fun f4() {}
+val p3: Int
+    get() = 1
+fun f5() = 1
+
+class OneLine {
+    fun f1() {}
+
+    val p1 = 1
+
+    fun f2() {}
+
+    fun f3() = 1
+
+    val p2 = 1
+
+    fun f4() = 1
+
+    fun f4() {}
+
+    val p3: Int
+        get() = 1
+
+    fun f5() = 1
+}
+
+class TwoLines {
+    fun f1() {}
+
+
+    val p1 = 1
+
+
+    fun f2() {}
+
+
+    fun f3() = 1
+
+
+    val p2 = 1
+
+
+    fun f4() = 1
+
+
+    fun f4() {}
+
+
+    val p3: Int
+        get() = 1
+
+
+    fun f5() = 1
+}
+