The NumPy developers had a problem that could only be solved by adding
a new special method, \method{__index__}. When using slice notation,
-as in \code{[\var{start}:\var{stop}:\var{step}], the values of the
+as in \code{[\var{start}:\var{stop}:\var{step}]}, the values of the
\var{start}, \var{stop}, and \var{step} indexes must all be either
integers or long integers. NumPy defines a variety of specialized
integer types corresponding to unsigned and signed integers of 8, 16,