Simplify (if COND nil BODY) to (unless COND BODY)

diff --git a/lisp/emacs-lisp/debug.el b/lisp/emacs-lisp/debug.el
index 038aadcdc07543c6657dd92402ae66fd5a35c21c..25ede070e5caf30e7f63ec1a18765d0b785222e0 100644 (file)
--- a/lisp/emacs-lisp/debug.el
+++ b/lisp/emacs-lisp/debug.el
@@ -781,8 +781,7 @@ To specify a nil argument interactively, exit with an empty minibuffer."
 (defun debug--implement-debug-watch (symbol newval op where)
   "Conditionally call the debugger.
 This function is called when SYMBOL's value is modified."
-  (if (or inhibit-debug-on-entry debugger-jumping-flag)
-      nil
+  (unless (or inhibit-debug-on-entry debugger-jumping-flag)
     (let ((inhibit-debug-on-entry t))
       (funcall debugger 'watchpoint symbol newval op where))))