KT-6159: rename duplicates met

idea/testData/refactoring/inline/function/expressionBody/MultipleInExpression.kt.after

@@ -1,8 +1,8 @@
 class Point(val x: Double, val y: Double) {
     // After sqr inlining, only first usage of sqr is replaced
     fun distance(other: Point): Double {
-        val x = x - other.x
+        val x1 = x - other.x
         // See KT-17022
-        return Math.sqrt(x * x + sqr(y - other.y))
+        return Math.sqrt(x1 * x1 + sqr(y - other.y))
     }
 }