ChangeFunctionLiteralReturnTypeFix for EXPECTED/ASSIGNMENT_TYPE_MISMATCH errors

idea/testData/quickfix/typeMismatch/typeMismatchOnReturnedExpression/afterAssignmentTypeMismatch.kt

@@ -0,0 +1,7 @@
+// "Change 'f' type to '() -> Unit'" "true"
+fun foo() {
+    val f: () -> Unit = {
+        var x = 1
+        x += 21<caret>
+    }
+}

idea/testData/quickfix/typeMismatch/typeMismatchOnReturnedExpression/afterExpectedTypeMismatch.kt

@@ -0,0 +1,7 @@
+// "Change 'bar' type to '(() -> Long) -> Unit'" "true"
+fun foo() {
+    val bar: (() -> Long) -> Unit = {
+        (f: () -> Long): Unit ->
+        var x = 5<caret>
+    }
+}

idea/testData/quickfix/typeMismatch/typeMismatchOnReturnedExpression/beforeAssignmentTypeMismatch.kt

@@ -0,0 +1,7 @@
+// "Change 'f' type to '() -> Unit'" "true"
+fun foo() {
+    val f: () -> Int = {
+        var x = 1
+        x += 21<caret>
+    }
+}

idea/testData/quickfix/typeMismatch/typeMismatchOnReturnedExpression/beforeExpectedTypeMismatch.kt

@@ -0,0 +1,7 @@
+// "Change 'bar' type to '(() -> Long) -> Unit'" "true"
+fun foo() {
+    val bar: () -> Double = {
+        (f: () -> Long): String ->
+        var x = 5<caret>
+    }
+}