\end{verbatim}
Note that numeric literals do not include a sign; a phrase like
-\code{-1} is actually an expression composed of the operator
+\code{-1} is actually an expression composed of the unary operator
\code{-} and the literal \code{1}.
That is not a future statement; it's an ordinary import statement with
no special semantics or syntax restrictions.
-Code compiled by an exec statement or calls to the builtin functions
+Code compiled by an \keyword{exec} statement or calls to the builtin functions
\function{compile()} and \function{execfile()} that occur in a module
\module{M} containing a future statement will, by default, use the new
syntax or semantics associated with the future statement. This can,
starting with Python 2.2 be controlled by optional arguments to
-\function{compile()} --- see the documentation of that function in the
-library reference for details.
+\function{compile()} --- see the documentation of that function in the
+\citetitle[../lib/built-in-funcs.html]{Python Library Reference} for
+details.
A future statement typed at an interactive interpreter prompt will
take effect for the rest of the interpreter session. If an