"Replace if with when": Do not remove block braces if block has single lambda expression #KT-26187 Fixed

idea/testData/intentions/branched/ifWhen/ifToWhen/lambdaExpression.kt

@@ -0,0 +1,9 @@
+fun test(x: Int) {
+    val f: Function<Int> = <caret>if (x == 0) {
+        { 0 }
+    } else if (x == 1) {
+        { 1 }
+    } else {
+        { 2 }
+    }
+}

idea/testData/intentions/branched/ifWhen/ifToWhen/lambdaExpression.kt.after

@@ -0,0 +1,13 @@
+fun test(x: Int) {
+    val f: Function<Int> = when (x) {
+        0 -> {
+            { 0 }
+        }
+        1 -> {
+            { 1 }
+        }
+        else -> {
+            { 2 }
+        }
+    }
+}

idea/testData/intentions/branched/ifWhen/ifToWhen/lambdaExpression2.kt

@@ -0,0 +1,9 @@
+fun test(x: Int) {
+    val f: Function<Int> = <caret>if (x == 0) {
+        ({ 0 })
+    } else if (x == 1) {
+        (({ 1 }))
+    } else {
+        ((({ 2 })))
+    }
+}

idea/testData/intentions/branched/ifWhen/ifToWhen/lambdaExpression2.kt.after

@@ -0,0 +1,13 @@
+fun test(x: Int) {
+    val f: Function<Int> = when (x) {
+        0 -> {
+            ({ 0 })
+        }
+        1 -> {
+            (({ 1 }))
+        }
+        else -> {
+            ((({ 2 })))
+        }
+    }
+}