why is this html looks like this?

[Bruno Wolff III]

On Tue, Jan 04, 2011 at 12:50:28 -0800,
  S Mathias <smathias1972 at yahoo.com> wrote:
> soruce code of the html file:
> http://img443.imageshack.us/img443/6448/sourcey.png
> it looks like this in the realiy:
> http://img443.imageshack.us/img443/6448/sourcey.png
> 
> WHY? 
> 
> if i put it in "< pre >", then it's good.
> but if it isn't in "< pre >" then the lines ends are random. why dont they end in the same vertical line?
> 
> thank you, and sorry for askin html...i just can't figure it out :(

I think that commonly fixed space fonts are used to render stuff in a pre
block, and proportional fonts are normally used in other cases. If you are
trying to line up columns of characters, that won't work well with proportional
fonts.