Deletes all tags from the segment which have a tag type of UnmatchedStart or UnmatchedEnd. Note that this method only tests the tag type, and does not handle paired tags where the start or end tag are missing.

Deletes all tags from the segment which have a tag type of UnmatchedStart or UnmatchedEnd, if these tags occur in peripheral positions, which means that dangling end tags are only removed if they appear at the start of the segment, and dangling start tags are only removed if they appear at the end of the segment, with no other tags or text preceding the tag (in case of segment-initial dangling end tags), or following the tag (for segment-trailing dangling start tags).

Note that this method only tests the tag type, and does not handle paired tags where the start or end tag are missing.