branch scratch/handler-bind created (now 933bc573c60)

[Stefan Monnier]

monnier pushed a change to branch scratch/handler-bind.

        at  933bc573c60 (macroexp--with-extended-form-stack): Use plain `let`

This branch includes the following new commits:

       new  23479891db8 New special form `handler-bind`
       new  089c87c61db (eval-expression): Fix bug#67196
       new  7da237eb092 edebug.el: Use `handler-bind` instead of 
`signal-hook-function`
       new  a97a2363e39 ert.el: Use `handler-bind` to record backtraces
       new  8f090cd421d tramp.el: Use `handler-bind` instead of 
`signal-hook-function`
       new  68c95fc6682 startup.el: Use `handler-bind` to implement 
`--debug-init`
       new  2f6f38ddc79 Move batch backtrace code to `top_level_2`
       new  1fcb76b0465 Allow the `error-message` property to be a function
       new  e7c19f33112 (edebug-format): Make it obsolete
       new  071ea552e6b Add `redisplay-counter` to catched nested redisplays 
and abort outer one
       new  453f977d642 misc debug-early.el (incl. debug-early-muted)
       new  933bc573c60 (macroexp--with-extended-form-stack): Use plain `let`