Adjust testData to CharSequence.length transformation

compiler/testData/diagnostics/tests/smartCasts/varnotnull/inference.kt

@@ -2,20 +2,20 @@
 fun f() {
   var s: String?
   s = "a"
-  var s1 = "" // String – ?
+  var s1 = "" // String � ?
   if (<!SENSELESS_COMPARISON!>s != null<!>) {    // Redundant
-    s1.length()
+    s1.length
     // We can do smartcast here and below
     s1 = <!DEBUG_INFO_SMARTCAST!>s<!>.toString() // return String?
-    s1.length()
+    s1.length
     s1 = <!DEBUG_INFO_SMARTCAST!>s<!>
-    s1.length()
+    s1.length
     // It's just an assignment without smartcast
     val s2 = s
     // But smartcast can be done here
-    <!DEBUG_INFO_SMARTCAST!>s2<!>.length()
+    <!DEBUG_INFO_SMARTCAST!>s2<!>.length
     // And also here
     val s3 = <!DEBUG_INFO_SMARTCAST!>s<!>.toString()
-    s3.length()
+    s3.length
   }
 }