svn update

I would like to update a single file. I seem to be able to do this in TortoiseSVN. However, I seem unable to do this from the command line. This is because I put a minus in front of the update option and misunderstood the error message.

According to the FAQ, one cannot checkout a single file.
(see http://subversion.tigris.org/faq.html#single-file-checkout). However, one can update a single file. This is not made plain in the "Subversion Complete Reference" page 262. I have add [file] below [PATH...] to make this plain in my copy.