Fix E = MC2 quote typo

[manovotny]

Mucking up history... Oops!

Error:

Still sticking with science and Isaac Newton's E = MC², which should lift the 2 up.

Should be:

Still sticking with science and Albert Einstein's E = MC², which should lift the 2 up.

[GaryJones]

When editing the XML file directly for this fix (x3), the diff shows all of the content has changed, presumably line-endings are not consistently Unix? Is this indicative of a separate issue? I ask, since being able to edit the XML files directly for simple changes like this would be considerably easier. I suspect this may well be the case with the diff in #22 too.