Add shortcuts for RStudio to "all" Intro to R episodes/lessons

[laureltree]

Kia ora,

I noticed that some of the "Intro to R" sessions provide (some) of the shortcuts that make working in RStudio so much faster, but not all of them do this.

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Mentions some shortcuts:

E.g. in https://datacarpentry.org/R-ecology-lesson/01-intro-to-r.html it says:

In RStudio, typing Alt + - (push Alt at the same time as the - key) will write <- in a single keystroke in a PC, while typing Option + - (push Option at the same time as the - key) does the same in a Mac.

I suggest to add at least the "save script" (Ctrl + S) and "run code" shortcut (Ctrl + Enter).

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Mentions no shortcuts:

E.g. other lessons such as http://swcarpentry.github.io/r-novice-inflammation/01-starting-with-data/index.html:

Here, no shortcuts are mentioned at all.

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I have been asked for shortcuts in my R workshops regularly and repeatedly, so I believe adding these (maybe even as a noticeable box) to the beginning of each "Intro to R"-related episode would be useful.

What do others think?

Thanks,
laureltree

[HaoZeke]

Hi @laureltree, that would definitely be a good idea, would you be able to open a PR for the same?