second set of ANSI C changes: C89-style function declarations, more inline functions, remove register keyword

builtins/echo.def

@@ -1,7 +1,7 @@
 This file is echo.def, from which is created echo.c.
 It implements the builtin "echo" in Bash.
 
-Copyright (C) 1987-2018 Free Software Foundation, Inc.
+Copyright (C) 1987-2018,2022 Free Software Foundation, Inc.
 
 This file is part of GNU Bash, the Bourne Again SHell.
 
@@ -107,8 +107,7 @@ int xpg_echo = 0;
    `-n', then don't print a trailing newline.  We also support the
    echo syntax from Version 9 Unix systems. */
 int
-echo_builtin (list)
-     WORD_LIST *list;
+echo_builtin (WORD_LIST *list)
 {
   int display_return, do_v9, i, len;
   char *temp, *s;