| PASS Header value: hello world\0 | |
| PASS Header value: \0hello world | |
| PASS Header value: hello\0world | |
| PASS Header value: __hello_world | |
| PASS Header value: hello_world__ | |
| PASS Header value: __hello_world__ | |
| PASS Header value: [tab]hello_world | |
| PASS Header value: hello_world[tab] | |
| PASS Header value: [tab]hello_world[tab] | |
| PASS Header value: hello______world | |
| PASS Header value: hello[tab]world | |
| PASS Header value: \0 | |
| PASS Header value: ___ | |
| PASS Header value: [tab] | |
| PASS Header value: | |