This is a test to see how Google deals with two URLs - one that ends with a forward slash and one that is effectively clean. This one is the latter. If you add a forward slash to the end of this URL, you should see this text change.
I want to see how search engines treat these two pages. They should technically treat them as unique and I'd expect both of these pages to end up indexed, but this may not necessarily be the case. Things like this crop up from time to time in the sites that we see, and it'd be of benefit to see whether search engines genuinely do see them as two unique pages.
Give it a try - try adding a slash to the end of this URL to see all of the text change. The rest of this copy is just so there's a larger amount of unique text to make it suitably different, so you can ignore this sentence.