Re: tabs turned into space when going into Org Src...?

[Greg Minshall]

Diego,

thanks for looking at it.  i apologize for not having looked at an
"emacs -Q" (and, thanks to Ihor for, a few days ago, having pointed out
how to "emacs -Q" with one's "normal" org version).

: emacs -Q -L ~/.emacs.d/elpa/org-20201012/ -l org

exhibits *half* of the behavior i am mentioning.
----
#+begin_src makefile
  a:
        echo foo
#+end_src
----
a leading tab is converted to spaces in the Org Src buffer.  but, in
this vanilla configuration, when i return the source to the .org file,
the spaces have been converted back into a tab.

it turns out, this (in my ~/.emacs) is the culprit:
: (setq-default indent-tabs-mode nil)
when indent-tabs-mode is nil, the recovered contents of the source block
have had the tab converted into spaces.

i guess i'm at the same question: is it likely a bug, or a feature?

Greg