Teach me how to use a website

need help with using a website. Somehow, for the life of me, I'm unable to use its features. I want to be told what I'm essentially missing. The problem in short is this- the website does a brilliant job of getting my desired results. However, I'm unable to copy those exaact results. The website does not have any restrictions. I'm also welcome to suggestions about any such other sites which can be helpful. The site- The problem- I have two txt files. For instance, I have a line " 2019-08-26/cc/" in file 1. In file 2, i just have " ". So when i upload these two files on the site for a comparison, in the right column with file 2 uploaded, i get the line desired going by similarity, which is " 2019-08-26/cc/". However, when i click on &...