How does `cat` work in ipython interactive shell?

interactive, ipython, python, shell

Solution

`cat` is one of the pre-defined system command aliases. Type `%alias` to see the list of aliases in your current ipython session.

Problem

I noticed that using `cat` on a file works in ipython. It doesn't appear to be listed as a magic command... so I am confused how/why it works. What lets `cat` work in ipython interactive shell?

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