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Shared Variables
The info files also allow certain variables to be expanded at runtime. 
To expand a variable, precede it with a dollar sign (and put it in curly
braces just to be safe).  Here are the variables CVS knows about:
- ${CVSROOT} - The top of the repository.
- ${RCSBIN} - (Obsolete) Don't use this variable.  It is only
applicable in CVS Version 1.9.18 and older.  Specifying it now may
result in an error.
- ${CVSEDITOR} ${VISUAL} ${EDITOR} - These all expand to the editor
that CVS is using for a log message.
- ${USER} - The user running CVS (on the server side).