eval() example: Removed final interpreter prompt; other examples don't have

the empty prompt.

Doc/lib/libfuncs.tex

@@ -170,7 +170,6 @@ class instances are callable if they have a \method{__call__()} method.
 >>> x = 1
 >>> print eval('x+1')
 2
->>> 
 \end{verbatim}
 
   This function can also be used to execute arbitrary code objects