WTF, Now I feel like I am in Twilight Zone. At the URL https://www.inf.puc-rio.br/~roberto/docs/peg.pdf I see different PDF documents depending on which Chrome I use!!! In desktop Chrome, I see a paper by Roberto Ierusalimschy, in Chrome on Android phone I see a COMPLETELY DIFFERENT paper by Bryan Ford on the same topic. I've tried clearing the cache and reloading in both browsers at least three times.
@fuxoft
Have you tried in both browsers capitalizing the first letter?