go has 8 space tabs and not sure how to deal with that from within Emacs, setting tab-width doesn't do anything. So I just have to deal with wildly right-aligned code, even two nests deep.
Another option is to use dtrt-indent. It is analyzes an existing file and sets up Emacs to mimick that exact tab/space indention to style.
But even without external modules you can configure the behavior of the tab key and how a tab character is viewed. It is however a tad bit complicated, because Emacs can have C, Python and Go files open, all with their specific preferences ...
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