Update docs for a bunch of 24.3 changes.

* doc/emacs/killing.texi (Rectangles): Document copy-rectangle-as-kill.

* doc/emacs/search.texi (Special Isearch): Document the lax space search
feature and M-s SPC.
(Regexp Search): Move main search-whitespace-regexp description to
Special Isearch.
(Replace): Document replace-lax-whitespace.

* doc/emacs/basic.texi (Position Info): Document C-u M-=.
(Moving Point): Document move-to-column.

* doc/emacs/display.texi (Useless Whitespace): Add delete-trailing-lines.

* doc/emacs/misc.texi (emacsclient Options): Document the effect of
initial-buffer-choice on client frames.  Document server-auth-dir.
Do not document server-host, which is bad security practice.

* doc/emacs/building.texi (Lisp Libraries): Docstring lookups can trigger
autoloading.  Document help-enable-auto-load.

* doc/emacs/mini.texi (Yes or No Prompts): New node.

* doc/emacs/ack.texi (Acknowledgments): Remove obsolete packages.

* doc/lispref/commands.texi (Click Events): Define "mouse position list".
Remove mention of unimplemented horizontal scroll bars.
(Drag Events, Motion Events): Refer to "mouse position list".
(Accessing Mouse): Document posnp.

* doc/lispref/errors.texi (Standard Errors): Tweak arith-error description.
Tweak markup.  Remove domain-error and friends, which seem to be
unused after the floating-point code revamp.

* doc/lispref/functions.texi (Obsolete Functions): Obsolescence also affects
documentation commands.  Various clarifications.
(Declare Form): New node.

* doc/lispref/loading.texi (Autoload):
* doc/lispref/help.texi (Documentation Basics): The special sequences can
trigger autoloading.

* doc/lispref/macros.texi (Defining Macros): Move description of `declare' to
Declare Form node.

* doc/lispref/numbers.texi (Integer Basics): Copyedits.
(Float Basics): Consider IEEE floating point always available.
(Random Numbers): Document actual limits.
(Arithmetic Operations): Clarify division by zero.  Don't mention
the machine-independence of negative division since it does not
happen in practice.

* doc/lispref/os.texi (Idle Timers): Minor clarifications.
(User Identification): Add system-users and system-groups.

* doc/lispref/strings.texi (String Basics): Copyedits.

* lisp/minibuffer.el (minibuffer-local-filename-syntax): Doc fix.

* lisp/server.el (server-host): Document the security implications.
(server-auth-key): Doc fix.

* lisp/startup.el (initial-buffer-choice): Doc fix.

* src/fns.c (Frandom): Doc fix.

1 files changed, 5 insertions, 3 deletions

diff --git a/doc/lispref/loading.texi b/doc/lispref/loading.texi
index 3c9bee96639..aa243185359 100644
--- a/doc/lispref/loading.texi
+++ b/doc/lispref/loading.texi
@@ -384,11 +384,13 @@ non-@acronym{ASCII} characters written as @code{?v@var{literal}}.
 @section Autoload
 @cindex autoload
 
-  The @dfn{autoload} facility allows you to register the existence of
-a function or macro, but put off loading the file that defines it.
-The first call to the function automatically reads the proper file, in
+  The @dfn{autoload} facility lets you register the existence of a
+function or macro, but put off loading the file that defines it.  The
+first call to the function automatically loads the proper library, in
 order to install the real definition and other associated code, then
 runs the real definition as if it had been loaded all along.
+Autoloading can also be triggered by looking up the documentation of
+the function or macro (@pxref{Documentation Basics}).
 
   There are two ways to set up an autoloaded function: by calling
 @code{autoload}, and by writing a special ``magic'' comment in the