This is for tail v8.28 encountered on Ubuntu 18.04. I was doing some experimentation with nano v2.9.3 and tail, watching the output of tail after saving in nano and encountered some strange behavior.
I had two terminals open side by side; one with nano and one with tail. I opened a file called test.txt in nano and saved with ^w in the first terminal. I went to the second terminal and ran tail -f test.txt to watch the file. I went back to the nano terminal and returned twice and saved. The tail terminal reports this change properly. With the file still open in nano, I write any number of characters and save. The tail terminal reports this change But skips the first character. I also tested this with -F. This may not be an issue because it only happens when using the write(ctrl-o, ctrl-s) in nano and not closing the file. I have reproduced this on two machines.
