Make page on Whitespace handling easier to read

[jwickberg]

I referred someone to our whitespace page and it was hard for them to understand since we use the term "whitespace" in a limited since for most of the page, but the tendency is to read it as "Unicode Whitespace".

So, seems we need to say "X Whitespace" when we mean the 4 characters defined at the top of the page. I haven't come up with a good name for X.

This will make the text a little longer, but I think it will be clearer.

[klassenjm]

I've done a second pass on the whitespace page. I applied the term 'common whitespace'.

[jwickberg]

This reads much better to me, so I'm closing this issue.