Test for Task 4

This task doesn't have a test case, so even I finished the other task, the tests will succeed.

Lines 31 to 32 in b6f541e

    
           // Task 4: redirect the GET URL "log-in" to a URL "login" 
        
           // Put one code line here below

I added the test for this task in #100.

Thank you for all the wisdom you shared

@kholisabdullah damn, how could I forget to add this test :) Thanks for the notice.

Actually, I think now it's too late to fix the tests, cause there are 90 PRs, and that new test may invalidate them. So let's consider this my mistake, with the conclusion to be more careful in the future.

	// Task 4: redirect the GET URL "log-in" to a URL "login"
	// Put one code line here below