docs/150490: newfs man page clarification

[Warren Block]

On Sat, 11 Sep 2010, Eitan Adler wrote:

>> Description:
> Index: newfs.8
> ===================================================================
> --- newfs.8	(revision 209815)
> +++ newfs.8	(working copy)
> @@ -82,7 +82,7 @@
> This is a relevant option for flash based storage devices that use
> wear levelling algorithms.
>
> -NB: Erasing may take as long time as writing every sector on the disk.
> +NB: Erasing may take as long time as it writes to every sector on the disk.
                         ^^
Should be "a" instead of "as".