and "can not" -> "cannot"

(though there is some debate on this issue, if you can use "can't" you
should use "cannot" if you want to be more formal; "cannot" implies more
impossibility whereas "can not" implies that the possibility also exists)


On Sun, Dec 8, 2013 at 12:46 AM, Aaron Meurer <notifications@github.com>wrote:

> In sympy/functions/combinatorial/numbers.py:
>
> > @@ -1056,7 +1056,8 @@ def nC(n, k=None, replacement=False):
> >              if not replacement:
> >                  return 2**n
> >              return sum(nC(n, i, replacement) for i in range(n + 1))
> > -        assert k >= 0
> > +        if k<0:
> > +            raise ValueError("Value of k can not be negative")
>
> "value of" is redundant.
>
> —
> Reply to this email directly or view it on GitHub<https://github.com/sympy/sympy/pull/2655/files#r8184015>
> .
>