Hello,
I believe that I have found a mistake in a comment to
parse_phrase_operator function. The comment has the following line:
a <X> b (distance is no greater than X)
which is not. According to documentation and practical results, this
line should me changed on something like:
a <X> b (distance is equal to X)
Patch in the attachments fixes the issue.
Thank you for attention!
Best,
Victor