replace lambda in `define-key' calls with named functions

also, invert CxCc to CcCx.

modules/org-noter-pdf.el

@@ -501,19 +501,20 @@ current heading inherit the COLUMN_EDGES property."
 
 ;;; override some deleterious keybindings in pdf-view-mode.
 (define-key org-noter-doc-mode-map (kbd "C-c C-c")
-  (lambda ()
+  (defun org-noter-pdf--execute-CcCc-in-notes ()
+    "Override C-c C-c in pdf document buffer."
     (interactive)
     (select-window (org-noter--get-notes-window))
     (org-ctrl-c-ctrl-c)))
 
-(defun org-noter-pdf--execute-CxCc-in-notes ()
-  "Execute C-c C-x prefixed command in notes buffer."
-  (interactive)
-  (let ((this-CxCc-cmd (vector (read-event))))
-    (select-window (org-noter--get-notes-window))
-    (execute-kbd-macro
-     (vconcat (kbd "C-c C-x") this-CxCc-cmd))))
-(define-key org-noter-doc-mode-map (kbd "C-c C-x") 'org-noter-pdf--execute-CxCc-in-notes)
+(define-key org-noter-doc-mode-map (kbd "C-c C-x")
+  (defun org-noter-pdf--execute-CcCx-in-notes ()
+    "Override C-c C-x <event> in pdf document buffer."
+    (interactive)
+    (let ((this-CxCc-cmd (vector (read-event))))
+      (select-window (org-noter--get-notes-window))
+      (execute-kbd-macro
+       (vconcat (kbd "C-c C-x") this-CxCc-cmd)))))
 
 (provide 'org-noter-pdf)
 ;;; org-noter-pdf.el ends here