Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style. The actual code should be the same afterward, this is just cosmetic refactoring.

/* clear.c - clear the screen
 *
 * Copyright 2012 Rob Landley <rob@landley.net>

USE_CLEAR(NEWTOY(clear, NULL, TOYFLAG_USR|TOYFLAG_BIN))

config CLEAR
  bool "clear"
  default y
  help
    Clear the screen.
*/

#include "toys.h"

void clear_main(void)
{
  write(1, "\e[2J\e[H", 7);
}