Adjust testData to CharSequence.length transformation

compiler/testData/diagnostics/tests/smartCasts/loops/doWhileLiteral.kt

@@ -3,8 +3,8 @@ fun x(): Boolean { return true }
 public fun foo(p: String?): Int {
     // Exotic variant with unused literal
     do <!UNUSED_FUNCTION_LITERAL!>{ ->
-        p!!.length()
+        p!!.length
     }<!> while (!x())
-    // Literal is not called so p.length() is unsafe
-    return p<!UNSAFE_CALL!>.<!>length()
+    // Literal is not called so p.length is unsafe
+    return p<!UNSAFE_CALL!>.<!>length
 }