typo in doc

doc/reference.rst

@@ -360,7 +360,7 @@ Arduino API
  One will notice that in the network to serial direction, data are transfered
  byte by byte while data are available. In the other direction, a temporary
  buffer is created on stack, filled with available serial data, then
- transfered to network.
+ transferred to network.
 
  The ``readBytes(buffer, length)`` method includes a timeout to ensure that
  all required bytes are received. The ``write(buffer, length)`` (inherited
@@ -415,7 +415,7 @@ Stream extensions
 
  This method waits up to the given or default timeout to transfer data
  until the character ``delim`` is met. 
- Note: The delimiter is read but not transfered (like ``readBytesUntil``)
+ Note: The delimiter is read but not transferred (like ``readBytesUntil``)
 
  - ``Stream::sendAvailable(dest)``
 
@@ -446,7 +446,7 @@ Stream extensions
  ``F("some words in flash")`` or ``PROGMEM`` strings. This class makes
  no copy, even with data in flash. For flash content, byte-by-byte
  transfers is a consequence when "memcpy_P" cannot be used. Other
- contents can be transfered at once when possible.
+ contents can be transferred at once when possible.
 
  .. code:: cpp