Start working with spaces:

KT-1532 IDEA should remove extra whitespaces when reformmating code
KT-1378 Code formatting: spaces around ':'

#KT-1532 fixed
#KT-1378 fixed

idea/testData/quickfix/variables/changeMutability/afterValWithSetter.kt

@@ -1,6 +1,6 @@
 // "Make variable mutable" "true"
 class A() {
-    var a: Int = 0
-    set(v: Int) {
+    var a : Int = 0
+    set(v : Int) {
     }
 }