bug#28587: 26.0.60; Don't write object name strings in object-write method

[Eric Abrahamsen]

On 10/21/17 23:29 PM, Stefan Monnier wrote:

[...]

> This is more problematic since data generated with this hunk will be
> incompatible with an Emacs which doesn't have the other hunk applied.
> So I think this should be conditional on a defcustom and by default this
> defcustom should cause the code to still behave as before.

So where we're at now is, the previous chunk has gone into both master
and emacs-26. The next patch (below) would only go into master, so as to
be more conservative about what's emitted. Everything defaults to
current behavior.

This patch does two things: permits omission of the object name strings,
and permits shutting off indentation (which helps a lot for shrinking
the file size). In a previous version I had `eieio-print-depth' do
double duty as a boolean and an integer; this version has a separate
defvar for controlling whether indentation is printed at all.
`eieio-print-depth' still gets incremented; someone might find that
useful.

Eric

0001-Provide-more-control-over-writing-of-objects-in-obje.patch
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