Made div-test.c use doesclrscrafterexit().

It no longer waits for a key tap if it doesn't need to do that.

Also, normalized the source code formatting.

testcode/lib/div-test.c

@@ -2,15 +2,15 @@
 **
 ** This program tests the division and modulo operators
 ** and the div() library function.
-**
-** 2002-10-24, Greg King
 */
 
+#include <cc65.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
 
-static bool test(int dividend, int divisor) {
+static bool test (int dividend, int divisor)
+{
     div_t result;
 
     result = div (dividend, divisor);
@@ -18,21 +18,28 @@ static bool test(int dividend, int divisor) {
             dividend, divisor, dividend / divisor,
             dividend, divisor, dividend % divisor,
             result.quot, result.rem);
+
     return result.quot * divisor + result.rem != dividend;
 }
 
-int main(void) {
+int main (void)
+{
     bool t;
 
     printf ("\nTest of division and modulus operations:\n\n");
+
     t = test (+40, +3) ||
         test (+40, -3) ||
         test (-40, +3) ||
         test (-40, -3);
-        if (t)
+    if (t) {
         printf ("\nThe div() function made a wrong result!\n");
+    }
 
-        printf("\nTap a key, to exit. ");
+    if (doesclrscrafterexit ()) {
+        printf ("\nTap the Return key to quit. ");
         getchar ();
+    }
+
     return (int)t;
 }