bug#37087: indent-for-tab-command not ready for GNUmakefile mode

[Lars Ingebrigtsen]

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> LI> If I try `C-x h TAB' in Emacs 27, it just inserts a TAB character.  Is
> LI> there something else needed to reproduce the bug?
>
> Yes.
> Somebody else's makefile. The bigger the better.
> Not an empty makefile.
> You are testing on an empty makefile. Don't.

No, I was testing without transient mark mode -- it has to be on to
reproduce the bug.

So the bug is (with transient-mark-mode): Mark a region (that contains
tabs), and then hit TAB.  It'll remove all the (leading) tabs in the
region, oddly enough.

The bug is still present in Emacs 28.

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