Comment by goku12

I have seen this somewhere in the official documentation [a]. I know it's too much to expect a user to read the full application documentation. But the documentation for Emacs and several other GNU applications are absolute treasures. The elisp documentation for beginners is in fact a full on introductory text book on programming. So it's a good idea to invest some time on those if you plan to make Emacs your long term coding platform. The returns are significant - it isn't too hard to learn elisp and extend Emacs in ways that are difficult in other editors.

[a] A simple tip. You can find the function of a key sequence with this sequence: `C-h k <sequence>`. Try this with any regular letter key to see what the parent comment is talking about.