bug#54486: 29.0.50; Eshell `escaped' string property can "leak" into output

[Jim Porter]

On 3/20/2022 8:52 PM, Jim Porter wrote:
> I can't think of an obvious fix for this though. Any ideas?

I forgot to add: the obvious solution might be "just copy the string 
before propertizing it", but the string might be very long (e.g. output 
from an external command), so I think it's probably best to avoid making 
more copies than absolutely necessary.