Update Code_Intro.md

Author: mking99456

SBNYoung/Code_Intro.md

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-title: Git & GitHub
+title: Code Development
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 # Introduction to Code Development
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 ## Code Editors
 
 ### emacs
+Emacs is a lot of different things: a Lisp interpreter with text editing, some OS features, a shell (like bash) which modifies or adds on to existing bash shell features. Realistically, though, for a particle physics application, one would simply be using emacs as a text editor. A guide on how to use Emacs as a text editor can be found [here](https://fsl.fmrib.ox.ac.uk/fslcourse/unix_intro/textedit.html).
 
 ### vim