Change defgeneric so it doesn't completely redefine the function

* lisp/emacs-lisp/cl-generic.el (cl-generic-define): Don't throw away
previously defined methods.
(cl-generic-define-method): Let-bind purify-flag instead of using `fset'.
(cl--generic-prefill-dispatchers): Only define during compilation.
(cl-method-qualifiers): Remove redundant alias.
(help-fns-short-filename): Silence byte-compiler.
* test/automated/cl-generic-tests.el: Adjust to new defgeneric semantics.

1 files changed, 1 insertions, 2 deletions

diff --git a/lisp/ChangeLog.16 b/lisp/ChangeLog.16
index 457c1511af8..bc5267aadba 100644
--- a/lisp/ChangeLog.16
+++ b/lisp/ChangeLog.16
@@ -5030,8 +5030,7 @@
         * mouse.el (mouse-yank-primarY): Look for frame-type w32, not
         system-type windows-nt.
 
-        * server.el (server-create-window-system-frame): Look for window
-        type.
+        * server.el (server-create-window-system-frame): Look for window type.
         (server-proces-filter): Only force a window system when windows-nt
         _and_ w32.  Explain why.