[O] `:html-preamble` and `:html-postamble` options are lame

[Luca Sabbatini]

It seems to be that the `:html-preamble` and `:html-postamble` export options are impotent. They are overridden if the `org-export-html-preamble-format` and `org-export-html-postamble-format` are set to *anything*.

In order for the `:html-preamble` and `:html-postamble` html export options to even be considered during export, one must set their corresponding format variables to `nil`. But by then there's effectively no preamble or postamble to disable anyway.

How is one expected to make use of the :html-preamble` and `:html-postamble` options? (Perhaps I have misunderstood something).

In any case, shouldn't the options override the internal variables during export on the per-file basis?


Thank you for your time,

Luca