Spelling fixes e to i.

pkg/testing/lib/src/test_dart/path.dart

 // Copyright (c) 2012, 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 test_dart_copy.legacy_path;
 
 import 'dart:io';
 import 'dart:math';
 
 // TODO: Remove this class, and use the URI class for all path manipulation.
@@ skipping 16 matching lines @@
     // Remove trailing slash from directories:
     if (source.length > 1 && source.endsWith('/')) {
       return source.substring(0, source.length - 1);
     }
     return source;
   }
 
   static String _cleanWindows(String source) {
     // Change \ to /.
     var clean = source.replaceAll('\\', '/');
-    // Add / before intial [Drive letter]:
+    // Add / before initial [Drive letter]:
     if (clean.length >= 2 && clean[1] == ':') {
       clean = '/$clean';
     }
     if (_isWindowsShare(source)) {
       return clean.substring(1, clean.length);
     }
     return clean;
   }
 
   static bool _isWindowsShare(String source) {
@@ skipping 254 matching lines @@
     while (pos > 0 && _path[pos - 1] == '/') --pos;
     var dirPath = (pos > 0) ? _path.substring(0, pos) : '/';
     return new Path._internal(dirPath, isWindowsShare);
   }
 
   String get filename {
     int pos = _path.lastIndexOf('/');
     return _path.substring(pos + 1);
   }
 }