Adjust testData to CharSequence.length transformation

compiler/testData/diagnostics/tests/regressions/DoubleDefine.kt

@@ -9,7 +9,7 @@ fun takeFirst(expr: StringBuilder): Char {
 }
 
 fun evaluateArg(expr: CharSequence, numbers: ArrayList<Int>): Int {
-  if (expr.length() == 0) throw Exception("Syntax error: Character expected");
+  if (expr.length == 0) throw Exception("Syntax error: Character expected");
   val c = takeFirst(<!TYPE_MISMATCH!>expr<!>)
   if (c >= '0' && c <= '9') {
     val n = c - '0'
@@ -22,7 +22,7 @@ fun evaluateArg(expr: CharSequence, numbers: ArrayList<Int>): Int {
 
 fun evaluateAdd(expr: StringBuilder, numbers: ArrayList<Int>): Int {
   val lhs = evaluateArg(expr, numbers)
-  if (expr.length() > 0) {
+  if (expr.length > 0) {
 
   }
   return lhs
@@ -30,7 +30,7 @@ fun evaluateAdd(expr: StringBuilder, numbers: ArrayList<Int>): Int {
 
 fun evaluate(expr: StringBuilder, numbers: ArrayList<Int>): Int {
   val lhs = evaluateAdd(expr, numbers)
-  if (expr.length() > 0) {
+  if (expr.length > 0) {
     val <!UNUSED_VARIABLE!>c<!> = expr.get(0)
     expr.deleteCharAt(0)
   }

compiler/testData/diagnostics/tests/regressions/Jet121.kt

@@ -3,7 +3,7 @@ package jet121
 fun box() : String {
 val answer = apply("OK") {
   get(0)
-  length()
+  length
 }
 
 return if (answer == 2) "OK" else "FAIL"

compiler/testData/diagnostics/tests/regressions/kt549.kt

@@ -11,7 +11,7 @@ package demo
   }
 
 fun main(args : Array<String>) {
-  for (a in filter(args, {it.length() > 1})) {
+  for (a in filter(args, {it.length > 1})) {
     System.out.println("Hello, ${a}!")
   }
 }

compiler/testData/diagnostics/tests/regressions/kt580.kt

@@ -11,9 +11,9 @@ fun main() {
     val diffs = ArrayList<Int>()
     for (i in vals.indices) {
         for (j in i..vals.lastIndex())  // Type inference failed
-             diffs.add(vals[i].length() - vals[j].length())
+             diffs.add(vals[i].length - vals[j].length)
         for (j in i..vals.lastIndex)  // Type inference failed
-             diffs.add(vals[i].length() - vals[j].length())
+             diffs.add(vals[i].length - vals[j].length)
     }
 }