This tests whether search engines can find links that are written in plain text. This includes both absolute links, such as http://nrtests.com/spidering/plaintext-target1.html and also relative links, for example plaintext-target2.html (from the current page).
It also tests whether they will follow links in HTML comments, such as the one just below.
Next, lets try an empty link. This link is completely empty.
Page: NRTestsSpideringText