"Add else branch" on when quickfix: don't add braces #KT-5088 Fixed

idea/testData/quickfix/when/addElseBranchEnumStatement.kt.after

@@ -3,8 +3,7 @@ enum class Color { R, G, B }
 fun use(c: Color) {
     when (c) {
         Color.R -> red()
-        else -> {
-        }
+        else -> <caret>
     }
 }
 

idea/testData/quickfix/when/noElseInWhenWithBranches.kt.after

@@ -4,7 +4,6 @@ fun test() {
     val x = when (a) {
         in 0..11 -> { /* some code */ }
         12, 13, 14 -> { /* some code */ }
-        else -> {<caret>
-        }
+        else -> <caret>
     }
 }

idea/testData/quickfix/when/noElseInWhenWithoutBranches.kt.after

@@ -2,7 +2,6 @@
 fun test() {
     val a = 12
     val x = when (a) {
-        else -> {<caret>
-        }
+        else -> <caret>
     }
 }