As described nicely in this blog, the pro-TABS camp (including golang) exhort you to use TABs for indentation only, never for alignment:

It's very important to only use spaces for alignment. Never, ever, use tabs for alignment. Tabs may be used for indentation only.
I suspect this important distinction was not widely known in the 1990s, at least I don't remember it being mentioned back then.

In reply to Re^5: [RFC] Review of module code and POD (tab) by eyepopslikeamosquito
in thread [RFC] Review of module code and POD by Bod

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