Clarifying defining the .gitignore file in Ep.6 Ignoring things

[ghost]

As I novice going through this lesson (also my second pull request), it was not clear that the lesson is implying you need to define what you want to ignore with the '.gitignore' file as it jumps straight to the output of the new '.gitignore' file. This is likely because I am not familiar with nano.

Also a side note, the lesson starts using 'echo' toward the end and also the 'touch' command when creating new files which novices may not be familiar with. The 'Tracking Changes' episode does mention you can use any editor with a link to information about editors. Perhaps being consistent throughout the lesson with the editor or a line explaining echo is another editor would be helpful.

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