Get rid of all the library tags.

lib/src/runner/load_exception.dart

 // Copyright (c) 2015, 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.runner.load_exception;
-
 import 'dart:isolate';
 
 import 'package:path/path.dart' as p;
 import 'package:source_span/source_span.dart';
 
 import '../utils.dart';
 
 /// A regular expression for matching filename annotations in
 /// [IsolateSpawnException] messages.
 final _isolateFileRegExp =
@@ skipping 40 matching lines @@
     } if (innerError is SourceSpanException) {
       innerString = innerError.toString(color: color)
           .replaceFirst(" of $path", "");
     }
 
     buffer.write(innerString.contains("\n") ? "\n" : " ");
     buffer.write(innerString);
     return buffer.toString();
   }
 }