Remove the dynamic-docstring-function feature.

* emacs-lisp/advice.el (ad--make-advised-docstring): Change args.
Ignore function-documentation property when getting documentation.
(ad-activate-advised-definition): Use function-documentation
generate the docstring.
(ad-make-advised-definition): Don't call
ad-make-advised-definition-docstring.
(ad-make-advised-definition-docstring, ad-advised-definition-p):
Delete functions.

* emacs-lisp/nadvice.el (advice--make-docstring): Change args.
(advice--docstring): Delete variable.
(advice--make-1): Leave the docstring empty.
(advice-add): Use function-documentation for advised docstring.

* progmodes/sql.el (sql-help): Use function-documentation instead
of dynamic-docstring-function property.  No need to autoload now.
(sql--help-docstring): New variable.
(sql--make-help-docstring): Use it.

* doc.c (Fdocumentation): Remove dynamic-docstring-function.

1 files changed, 0 insertions, 15 deletions

diff --git a/src/doc.c b/src/doc.c
index 0d9c8021cdf..ecefd776b85 100644
--- a/src/doc.c
+++ b/src/doc.c
@@ -416,21 +416,6 @@ string is passed through `substitute-command-keys'.  */)
       xsignal1 (Qinvalid_function, fun);
     }
 
-  /* Check for a dynamic docstring.  These come with
-     a dynamic-docstring-function text property.  */
-  if (STRINGP (doc))
-    {
-      Lisp_Object func
-        = Fget_text_property (make_number (0),
-                              intern ("dynamic-docstring-function"),
-                                      doc);
-      if (!NILP (func))
-        /* Pass both `doc' and `function' since `function' can be needed, and
-           finding `doc' can be annoying: calling `documentation' is not an
-           option because it would infloop.  */
-        doc = call2 (func, doc, function);
-    }
-
   /* If DOC is 0, it's typically because of a dumped file missing
      from the DOC file (bug in src/Makefile.in).  */
   if (EQ (doc, make_number (0)))