Small cleanups, and note when zip() entered the menagerie.

Doc/lib/libfuncs.tex

@@ -168,7 +168,6 @@ class instances are callable if they have a \method{__call__()} method.
 ['sys']
 >>> dir(sys)
 ['argv', 'exit', 'modules', 'path', 'stderr', 'stdin', 'stdout']
->>> 
 \end{verbatim}
 \end{funcdesc}
 
@@ -515,7 +514,6 @@ one argument, return the smallest of the arguments.
 []
 >>> range(1, 0)
 []
->>> 
 \end{verbatim}
 \end{funcdesc}
 
@@ -530,7 +528,6 @@ one argument, return the smallest of the arguments.
 --> Monty Python's Flying Circus
 >>> s
 "Monty Python's Flying Circus"
->>> 
 \end{verbatim}
 
 If the \module{readline} module was loaded, then
@@ -712,4 +709,5 @@ The returned list is truncated in length to the length of the shortest
 argument sequence.  When the argument sequences are all of the same
 length, \function{zip()} is similar to \function{map()} with an
 initial argument of \code{None}.
+\versionadded{2.0}
 \end{funcdesc}