Fix documentation in dart:io.

pkg/scheduled_test/lib/scheduled_process.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.
 
 library scheduled_test.scheduled_process;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 167 matching lines @@
     // We purposefully avoid using wrapFuture here. If an error occurs while a
     // process is running, we want the schedule to move to the onException
     // queue where the process will be killed, rather than blocking the tasks
     // queue waiting for the process to exit.
     _process.then((p) => Chain.track(p.exitCode)).then((exitCode) {
       _actualExitTask = currentSchedule.currentTask;
       exitCodeCompleter.complete(exitCode);
     });
   }
 
-  /// Converts a stream of bytes to a stream of lines and returns that along
-  /// with a [StreamCanceller] controlling it.
+  /// Converts a stream of byte lists to a stream of lines and returns that
+  /// along with a [StreamCanceller] controlling it.
   Pair<Stream<String>, StreamCanceller> _lineStreamWithCanceller(
       Future<Stream<List<int>>> streamFuture) {
     return streamWithCanceller(futureStream(streamFuture)
         .handleError(currentSchedule.signalError)
         .map((chunk) {
       // Whenever the process produces any sort of output, reset the schedule's
       // timer.
       currentSchedule.heartbeat();
       return chunk;
     })
@@ skipping 116 matching lines @@
     schedule(() {
       return _exitCode.then((exitCode) {
         if (expectedExitCode != null) {
           expect(exitCode, equals(expectedExitCode));
         }
       });
     }, "waiting for process '$description' to exit");
     _scheduledExitTask = currentSchedule.tasks.contents.last;
   }
 }