Add test for decompiled text

idea/testData/libraries/decompiledText/SimpleClass/SimpleClass.kt

@@ -0,0 +1,29 @@
+package test
+
+import dependency.*
+
+abstract class SimpleClass: D<Tr, Int>(), Tr, List<String> {
+    fun f() {
+    }
+
+    fun g(d: D<String, Tr>): List<D<A, Int>> {
+        throw AssertionError()
+    }
+
+    fun Int.f() {
+    }
+
+    private fun privateFun() {
+    }
+
+    val a: A = A()
+
+    public var b: B = B()
+
+    val Int.g: Int
+        get() = this + 2
+
+    fun <T, K, G> complexFun(a: T, b: K, c: G): G {
+        throw AssertionError()
+    }
+}