Optimize splitting lines with many rules.

lib/src/chunk.dart

 // Copyright (c) 2014, 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.
 
 library dart_style.src.chunk;
 
 import 'fast_hash.dart';
 import 'nesting_level.dart';
 import 'rule/rule.dart';
 
@@ skipping 236 matching lines @@
     if (_isDouble) parts.add("double");
     if (_flushLeft) parts.add("flush");
 
     if (_rule == null) {
       parts.add("(no split)");
     } else if (isHardSplit) {
       parts.add("hard");
     } else {
       parts.add(rule.toString());
 
-      if (_rule.outerRules.isNotEmpty) {
-        parts.add("-> ${_rule.outerRules.join(' ')}");
+      if (_rule.constrainedRules.isNotEmpty) {
+        parts.add("-> ${_rule.constrainedRules.join(' ')}");
       }
     }
 
     return parts.join(" ");
   }
 }
 
 /// Constants for the cost heuristics used to determine which set of splits is
 /// most desirable.
 class Cost {
@@ skipping 93 matching lines @@
   /// output. This way, commented out chunks of code do not get erroneously
   /// re-indented.
   final bool flushLeft;
 
   /// Whether this comment is an inline block comment.
   bool get isInline => linesBefore == 0 && !isLineComment;
 
   SourceComment(this.text, this.linesBefore,
       {this.isLineComment, this.flushLeft});
 }