Is this an easter egg in Notepad++ or a virus?

Question

Malware

I was working in notepad++ when suddenly a new tab opened and the following was printed:
"mondays are not so bad. it's your job that sucks" Have you
met with this?
In notepad executables, such a phrase is present.
What is an easter egg or a virus?
Notepad version: 7.4.2

Answer 1

https://gist.github.com/phoenix24/10457482