Test Framework documentation issue

[MarekPieta]

ZTest documentation in my opinion contains errors in code examples, which may be misleading readers:

#include <ztest.h>

extern void test_sometest1(void);
extern void test_sometest2(void);
#ifndef CONFIG_WHATEVER              /* Conditionally skip test_sometest3 */
void test_sometest3(void)
{
     ztest_test_skip();
}
#else
extern void test_sometest3(void);
#endif
extern void test_sometest4(void);
...

void test_main(void)
{
     ztest_test_suite(common,
                         ztest_unit_test(test_sometest1),
                         ztest_unit_test(test_sometest2),
                         ztest_unit_test(test_sometest3),
                         ztest_unit_test(test_sometest4),
                );
     ztest_run_test_suite(common);
}

The last comma in z_test_test_suite call shuld be removed.

void test_main(void)
{
#ifdef TEST_feature1
        ztest_test_suite(feature1,
                         ztest_unit_test(test_1a),
                         ztest_unit_test(test_1b),
                         ztest_unit_test(test_1c),
        ztest_run_test_suite(feature1);
#endif

#ifdef TEST_feature2
        ztest_test_suite(feature2,
                         ztest_unit_test(test_2a),
                         ztest_unit_test(test_2b),
        ztest_run_test_suite(feature2);
#endif
}

For calling ztest_test_suite the brackets are not closed and there is comma at the end.

[nashif]

@MarekPieta can you submit a PR fixing those?