syms_of_undo     2337 src/emacs.c          syms_of_undo ();
syms_of_undo     5032 src/lisp.h     extern void syms_of_undo (void);
syms_of_undo     4337 test/manual/etags/c-src/emacs/src/lisp.h extern void syms_of_undo (void);