[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/inference/regressions/kt948.fir.kt

@@ -0,0 +1,23 @@
+// !WITH_NEW_INFERENCE
+// !CHECK_TYPE
+
+//KT-948 Make type inference work with sure()/!!
+
+package a
+
+import java.util.*
+
+fun <T> emptyList() : List<T>? = ArrayList<T>()
+
+fun foo() {
+    // type arguments shouldn't be required
+    val l : List<Int> = emptyList()!!
+    val l1 = emptyList()!!
+
+    checkSubtype<List<Int>>(emptyList()!!)
+    checkSubtype<List<Int>?>(emptyList())
+
+    doWithList(emptyList()!!)
+}
+
+fun doWithList(list: List<Int>) = list