API: Correct documentation of String::WriteUtf8, String::Write...

include/v8.h

 // Copyright 2007-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 974 matching lines @@
    */
   V8EXPORT int Utf8Length() const;
 
   /**
    * Write the contents of the string to an external buffer.
    * If no arguments are given, expects the buffer to be large
    * enough to hold the entire string and NULL terminator. Copies
    * the contents of the string and the NULL terminator into the
    * buffer.
    *
+   * WriteUtf8 will not write partial UTF-8 sequences, preferring to stop
+   * before the end of the buffer.
+   *
    * Copies up to length characters into the output buffer.
    * Only null-terminates if there is enough space in the buffer.
    *
    * \param buffer The buffer into which the string will be copied.
    * \param start The starting position within the string at which
    * copying begins.
-   * \param length The number of bytes to copy from the string.
+   * \param length The number of characters to copy from the string.  For
+   *    WriteUtf8 the number of bytes in the buffer.
    * \param nchars_ref The number of characters written, can be NULL.
    * \param hints Various hints that might affect performance of this or
    *    subsequent operations.
-   * \return The number of bytes copied to the buffer
-   * excluding the NULL terminator.
+   * \return The number of characters copied to the buffer excluding the null
+   *    terminator.  For WriteUtf8: The number of bytes copied to the buffer
+   *    including the null terminator.
    */
   enum WriteHints {
     NO_HINTS = 0,
     HINT_MANY_WRITES_EXPECTED = 1
   };
 
   V8EXPORT int Write(uint16_t* buffer,
                      int start = 0,
                      int length = -1,
                      WriteHints hints = NO_HINTS) const;  // UTF-16
@@ skipping 2745 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_