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What? He doesn't even mention anywhere in his comment what editor he is using

And he didn't need to, any editor that mixes space indents with tabs is the wrong editor.

Untrue - start editing a file in a tabs editor, download a snippet from the internet that has spaces in it, and voila - you've screwed up your file.

And this happens all the time to professional developers, much less 9-year-old beginners.

Sublime Text's Anaconda will complain about tabs / spaces mismatch.

All is needed is to have editor that can show white spaces (i.e. show tabs differently than spaces, after all those are two different characters).

With that the whole issue with tabs and spaces no longer exists.

BTW if you are copying snippets of code from website "as is" in any language you will have to reformat it to fit your structure. Also if you copy code so often that this is becoming an issue I'm not sure I would want someone like that working for me.

> Also if you copy code so often that this is becoming an issue I'm not sure I would want someone like that working for me.

This seems like a cruel comment in a thread specifically talking about a 9-year-old learning her first language.

It's the wrong one if it doesn't convert tabs to spaces.

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