Rename "pathos" package to "path".

sdk/lib/_internal/dartdoc/lib/src/dartdoc/utils.dart

 // Copyright (c) 2013, 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.
 
 // Generic utility functions.
 library utils;
 
 import 'dart:io';
 import 'dart:math' as math;
 
-import 'package:pathos/path.dart' as pathos;
+import 'package:path/path.dart' as pathos;
 
 import '../../../../compiler/implementation/mirrors/mirrors.dart';
 
 import '../export_map.dart';
 
 /** Turns [name] into something that's safe to use as a file name. */
 String sanitize(String name) => name.replaceAll(':', '_').replaceAll('/', '_');
 
 /** Returns the number of times [search] occurs in [text]. */
 int countOccurrences(String text, String search) {
@@ skipping 110 matching lines @@
 
   String toString() => '($first, $last)';
 
   bool operator==(other) {
     if (other is! Pair) return false;
     return other.first == first && other.last == last;
   }
 
   int get hashCode => first.hashCode ^ last.hashCode;
 }