[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/examples/debugging/string_stream.h

 /*
  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef STRING_STREAM_H
 #define STRING_STREAM_H
 
 /*
- * Support for a stream stream in 'C', which is appened to via an sprintf-like
+ * Support for a stream stream in 'C', which is appended to via an sprintf-like
  * function.
  */
 
 #include <stdarg.h>
 #include <stdint.h>
 
 typedef struct {
   char *data;
   size_t length;
 } sstream_t;
 
 void ssinit(sstream_t *stream);
 void ssfree(sstream_t *stream);
 
 /* Returns the number of bytes added to the stream. */
 int ssvprintf(sstream_t *sstream, const char *format, va_list args);
 int ssprintf(sstream_t *sstream, const char *format, ...);
 
 
 #endif