It defines a function ``kbhit()`` which checks whether a keyboard hit is
present, and ``getch()`` which gets one character without echoing it.
-
-How do I extract the downloaded documentation on Windows?
----------------------------------------------------------
-
-Sometimes, when you download the documentation package to a Windows machine
-using a web browser, the file extension of the saved file ends up being .EXE.
-This is a mistake; the extension should be .TGZ.
-
-Simply rename the downloaded file to have the .TGZ extension, and WinZip will be
-able to handle it. (If your copy of WinZip doesn't, get a newer one from
-https://www.winzip.com.)