bug#62847: 29.0.90; Propertized space in Org Agenda's mode-name

[Ihor Radchenko]

Mattias Engdegård <mattiase@acm.org> writes:

> Counter to my usual preference for static checks I'd prefer a dynamic warning 
> in this case because it would be precise and the run-time cost would likely 
> be acceptable.
>
> That requires a 'literal' flag for string objects and there's no obvious 
> space for one, but perhaps we can grab the LSB of the `intervals` pointer.

Side note: It might be interesting to have something similar to
`add-variable-watcher' and `debug-on-variable-change', but for mutable
objects being modified.

-- 
Ihor Radchenko // yantar92,
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