improve readability of stdio: fix indentation and remove trailing spaces

Change-Id: Ic51e58a7c75d20bf770dc0ebd7f97a338fbe0036
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>

libc/stdio/sprintf.c

@@ -46,7 +46,7 @@ int
 sprintf(char *str, const char *fmt, ...)
 {
 	int ret;
-  va_list ap;
+	va_list ap;
 	FILE f;
 	struct __sfileext fext;
 
@@ -57,7 +57,7 @@ sprintf(char *str, const char *fmt, ...)
 	f._bf._size = f._w = INT_MAX;
 	va_start(ap, fmt);
 	ret = vfprintf(&f, fmt, ap);
-  va_end(ap);
+	va_end(ap);
 	*f._p = '\0';
 	return (ret);
 }