This fixes bug#65620.  The error thrown up to now was "Void
function edebug-after".  This has been replaced by "Invalid
call to `edebug-before'.  Is the edebug spec for `foo'
correct?".

* lisp/emacs-lisp/edebug.el (edebug-b/a-error): New function
which throws the new friendlier error message.
(edebug-before, edebug-after): Replace the defalias's to nil
with actual functions which just call edebug-b/a-error.

* doc/lispref/edebug.texi (Specification List): In the entry
for `sexp', warn against mistakenly using `form' for an

* lisp/emacs-lisp/edebug.el (edebug-all-defs):
* doc/lispref/eval.texi (Eval):
* doc/lispref/edebug.texi (Instrumenting, Edebug Options):
Remove remaining mentions of 'eval-current-buffer', obsoleted in
Emacs 22 and removed in Emacs 26.

* doc/lispref/edebug.texi (Edebug Display Update)
(Edebug Options): More details about Edebug changing buffer point
position.  Reported by Alan Mackenzie <acm@muc.de>.

The max-lisp-eval-depth limit is sufficient to prevent unbounded stack
growth including the specbind stack; simplify matters for the user by
not having them to worry about two different limits.  This change
turns max-specpdl-size into a harmless variable with no effects,
to keep existing code happy.

* lisp/subr.el (max-specpdl-size):
Define as an ordinary (but obsolete) dynamic variable.
* admin/grammars/Makefile.in:
* doc/lispintro/emacs-lisp-intro.texi (Loops & Recursion):
* doc/lispref/control.texi (Cleanups):
* doc/lispref/edebug.texi (Checking Whether to Stop):
* doc/lispref/eval.texi (Eval):
* doc/lispref/variables.texi (Local Variables):
* doc/misc/calc.texi (Recursion Depth):
Update documentation.
* etc/NEWS: Announce.
* src/eval.c
(FletX): Use safe iteration to guard against circular bindings list.
(syms_of_eval): Remove old max-specpdl-size definition.
(init_eval_once, restore_stack_limits, call_debugger)
(signal_or_quit, grow_specpdl_allocation):
* leim/Makefile.in:
* lisp/Makefile.in:
* lisp/calc/calc-stuff.el (calc-more-recursion-depth)
(calc-less-recursion-depth):
* lisp/calc/calc.el (calc-do):
* lisp/cedet/semantic/ede-grammar.el (ede-proj-makefile-insert-rules):
* lisp/cedet/semantic/grammar.el (semantic-grammar-batch-build-one-package):
* lisp/cus-start.el (standard):
* lisp/emacs-lisp/comp.el (comp--native-compile):
* lisp/emacs-lisp/edebug.el (edebug-max-depth):
(edebug-read-and-maybe-wrap-form, edebug-default-enter):
* lisp/emacs-lisp/regexp-opt.el (regexp-opt):
* lisp/eshell/esh-mode.el (eshell-mode):
* lisp/loadup.el (max-specpdl-size):
* lisp/mh-e/mh-e.el (mh-invisible-headers):
* lisp/net/shr.el (shr-insert-document, shr-descend):
* lisp/play/hanoi.el (hanoi-internal):
* lisp/progmodes/cperl-mode.el:
* src/fileio.c (Fdo_auto_save):
Remove references to and modifications of max-specpdl-size.

1c3d107cb5 Fix "C-u C-x =" for SPC
7e33618bbc ; * src/fns.c (Frequire): Fix a typo in the doc string.  (...
6908309827 Doc fixes: don't refer to some obsolete items
dc3cb749f3 Remove obsolete cust-print from elisp index
9ffbbddf8e * admin/make-tarball.txt: Minor clarifications.
f5421104e9 Fix external image conversion on MS-Windows
6f22631a63 * doc/emacs/buffers.texi (Indirect Buffers): Mention modif...

# Conflicts:
#	doc/emacs/buffers.texi
#	lisp/emacs-lisp/nadvice.el
#	lisp/image/image-converter.el

* doc/lispref/edebug.texi (Printing in Edebug): Remove obsolete
library "cust-print" from index.

* doc/lispref/edebug.texi (Edebug Eval): Document it.

* lisp/emacs-lisp/edebug.el (edebug-eval-expression): Allow
displaying the full value in a different buffer.

* doc/lispref/edebug.texi (Edebug Eval): Document it.

* lisp/emacs-lisp/edebug.el (edebug-eval-expression): Allow
displaying the full value in a different buffer.

* doc/lispref/debugging.texi (Error Debugging): Document it.

* doc/lispref/edebug.texi (Edebug Eval): Mention it.
* lisp/emacs-lisp/debug.el (debug-allow-recursive-debug): New user
option (bug#36145).
(debugger-eval-expression): Use it.

* lisp/emacs-lisp/edebug.el (edebug-eval-expression): Ditto.

This patch is based on a patch by Noam Postavsky.