551 TEST(first_word) {  in TEST()  argument
552         assert_se(first_word("Hello", ""));  in TEST()
553         assert_se(first_word("Hello", "Hello"));  in TEST()
554         assert_se(first_word("Hello world", "Hello"));  in TEST()
555         assert_se(first_word("Hello\tworld", "Hello"));  in TEST()
556         assert_se(first_word("Hello\nworld", "Hello"));  in TEST()
557         assert_se(first_word("Hello\rworld", "Hello"));  in TEST()
558         assert_se(first_word("Hello ", "Hello"));  in TEST()
560         assert_se(!first_word("Hello", "Hellooo"));  in TEST()
561         assert_se(!first_word("Hello", "xxxxx"));  in TEST()
562         assert_se(!first_word("Hellooo", "Hello"));  in TEST()