Get rid of a lot of () for getters.

samples/ui_lib/touch/Geometry.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Represents a point in 2 dimensional space.
  */
 class Coordinate {
 
   /**
@@ skipping 50 matching lines @@
 /**
  * Represents the interval { x | start <= x < end }.
  */
 class Interval {
 
   final num start;
   final num end;
 
   Interval(num this.start, num this.end) {}
 
-  num get length() {
+  num get length {
     return end - start;
   }
 
   bool operator ==(Interval other) {
     return other !== null && other.start == start && other.end == end;
   }
 
   Interval union(Interval other) {
     return new Interval(Math.min(start, other.start),
                         Math.max(end, other.end));
   }
 
   bool contains(num value) {
     return value >= start && value < end;
   }
 
   String toString() {
     return '(${start}, ${end})';
   }
 }