Use of expressions instead of plain text when converting when's

idea/testData/intentions/branched/ifWhen/whenToIf/whenWithMultiConditions.kt.after

@@ -1,5 +1,5 @@
 fun test(n: Int): String {
-    return <caret>if ((n < 0) || (n > 1000)) "unknown"
+    return <caret>if (n < 0 || n > 1000) "unknown"
     else if (n <= 10) "small"
     else if (n <= 100) "average"
     else "big"

idea/testData/intentions/branched/ifWhen/whenToIf/whenWithRangeTestsAndMultiConditions.kt.after

@@ -1,6 +1,6 @@
 fun test(n: Int): String {
-    return <caret>if ((n in 0..5) || (n in 5..10)) "small"
-    else if ((n in 10..50) || (n in 50..100)) "average"
-    else if ((n in 100..500) || (n in 500..1000)) "big"
+    return <caret>if (n in 0..5 || n in 5..10) "small"
+    else if (n in 10..50 || n in 50..100) "average"
+    else if (n in 100..500 || n in 500..1000) "big"
     else "unknown"
 }

idea/testData/intentions/branched/ifWhen/whenToIf/wrongIsAndInNoEnd.kt

@@ -0,0 +1,7 @@
+fun test(n: Int): String {
+    return <caret>when (n) {
+        is -> "String"
+        in -> "1..10"
+        else -> "unknown"
+    }
+}

idea/testData/intentions/branched/ifWhen/whenToIf/wrongIsAndInNoEnd.kt.after

@@ -0,0 +1,5 @@
+fun test(n: Int): String {
+    return if (n is ) "String"
+    else if (n in) "1..10"
+    else "unknown"
+}

idea/testData/intentions/branched/ifWhen/whenToIf/wrongIsAndInNoSubject.kt

@@ -0,0 +1,10 @@
+// ERROR: Expected condition of type kotlin.Boolean
+// ERROR: Expected condition of type kotlin.Boolean
+
+fun test(n: Int): String {
+    return <caret>when {
+        is String -> "String"
+        in 1..10 -> "1..10"
+        else -> "unknown"
+    }
+}

idea/testData/intentions/branched/ifWhen/whenToIf/wrongIsAndInNoSubject.kt.after

@@ -0,0 +1,8 @@
+// ERROR: Expected condition of type kotlin.Boolean
+// ERROR: Expected condition of type kotlin.Boolean
+
+fun test(n: Int): String {
+    return if (_ is String) "String"
+    else if (_ in 1..10) "1..10"
+    else "unknown"
+}