Here is a patch that adds a new LASTSEARCH zle parameter that provides
read-only access to the last string used in a zle incremental search command.
Before there was no way to access this value directly; and indirectly only via
the vi-repeat-find widgets.

This could be used to implement some sort of history for incremental search.
I use incremental search a lot.  I repeatedly use a set of search strings
during a session to get previous commands.

I made this into a ZLE parameter (e.g. HISTNO, LASTWIDGET) rather than a
global parameter (e.g. widgets & keymaps), since LASTSEARCH was like ZLE
parameters.  Though it seemed to me that LASTWIDGET, along with other ZLE
parameters could potentially be useful globally.

If I don't hear complaints, I'll check this in tomorrow.

-FR.




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