Clean up tests

tests/stdio/sprintf.c

@@ -0,0 +1,30 @@
+
+#include <stdio.h>
+
+int main(int argc, char ** argv) {
+    char buffer[72];
+    int ret = sprintf(
+        buffer,
+        "This string fits in the buffer because it is only %d bytes in length",
+        68
+    );
+
+    if (ret) {
+        printf("Failed! %d\n", ret);
+        return -1;
+    }
+
+    ret = snprintf(
+        buffer,
+        72,
+        "This string is way longer and does not fit in the buffer because it %d bytes in length",
+        87
+    );
+
+    if (!ret) {
+        return 0;
+    } else {
+        printf("Failed! %d", ret);
+        return -1;
+    }
+}