This is my first post here. I'd like to know why the "code command" did not work for me (code mario.c). I was trying to create a file as the professor did. This command is used by the professor, David J. Malan, in the video of Week 1 of the CS50's Introduction to Computer Science at 55:57. I tried a couple of times but all I got was the message of "command not found". Is the command outdated or am I doing something wrong?