Small grammatical changes; getting used to git.

I think I've got this set up now. I hope to go though all the display
text and make things a bit more consistent and correct. I was thinking
that every item description should include what is is and what it does
(at least vaguely) but I want to try and keep most of the original text
so as not to remove any personal flourishes. And this is just a tiny PR
so I can confirm I've got git configured right; in my future PR's much
more would be dense.