Stop atom from replacing "N r ." with numero sign

Hello,
i started using atom for coding recently. Now i have a stupid little problem: whenever i type “N r .” without spaces of course it gets replace with the unicode numero sign Nr. … hmm… the same happens when i type here :upside_down_face:

Where does this behaviour come from and how can I deactivate it? I don’t want this unicode sign in my code, just the plain text.

Thx in advance!

some more information

  • i am using atom v1.53.0
  • the replacement happens as soon as I type the “.” in any kind of file i edit (php, txt, cpp …)