p4raw-id: //depot/perl@30172
An optional third parameter can be used to specify the buffer
size used for copying. This is the number of bytes from the
-first file, that wil be held in memory at any given time, before
+first file, that will be held in memory at any given time, before
being written to the second file. The default buffer size depends
upon the file, but will generally be the whole file (up to 2Mb), or
1k for filehandles that do not reference files (eg. sockets).