getComment() throws but should return null instead

[rotdrop]

Describe the bug

API documents that UnifiedArchive::getComment() should return null when comments are not supported by either the archiver format or the used driver:

https://github.com/wapmorgan/UnifiedArchive/blob/master/docs/API.md#archive-information

However, the method actually throws an UnsupportedOperationException, see

UnifiedArchive/src/Drivers/BasicDriver.php

Line 260 in 495bf42

throw new UnsupportedOperationException();

Configration (please complete the following information):
Irrelevant for this issue.

To Reproduce
Run UnifiedArchive::getComment() e.g. on a .tar file.

Expected behavior
The method should return null as per API documentation or the API documentation should state the the method throws. It is of course perfectly fine if the method throws an exception, it is just documented differently.

[wapmorgan]

Fixed in 0d8a9b8

[wapmorgan]

released in 1.1.8.