Small suggestion: take a screenshot for https://opendocs.github.io/texme/examples/content-in-textarea.html and put the image in the README just under the Euler example code. People who scroll down quickly will see the result and not miss the link.
Thank you for this great suggestion. I have added a screenshot of it now to this section: https://github.com/susam/texme#content-in-textarea. Indeed the README looks much better now and lets the reader get a feel of the output without having to leave the page.