Rename "pathos" package to "path".

tools/line_doc_comments.dart

 #!/usr/bin/env dart
 
 /// Converts block-style Doc comments in Dart code to line style.
 library line_doc_comments;
 import 'dart:io';
 
-import '../pkg/pathos/lib/path.dart' as path;
+import '../pkg/path/lib/path.dart' as path;
 
 final oneLineBlock = new RegExp(r'^(\s*)/\*\*\s?(.*)\*/\s*$');
 final startBlock = new RegExp(r'^(\s*)/\*\*(.*)$');
 final blockLine = new RegExp(r'^\s*\*\s?(.*)$');
 final endBlock = new RegExp(r'^\s*\*/\s*$');
 
 main() {
   var args = new Options().arguments;
   if (args.length != 1) {
     print('Converts "/**"-style block doc comments in a directory ');
@@ skipping 63 matching lines @@
           }
         }
       }
     }
 
     if (line != null) buffer.write('$line\n');
   }
 
   return buffer.toString();
 }