pytail doesn't detect file-emptying/shrinking unlike standard tail

[TAbdiukov]

UNrelated: #15

I'm dealing with a file, that may get larger or, on the other hand, shrink (depending on the factors I don't control). The standard tail may detect and notify of the file shrinking via,

tail (filename).log: file trunkated

pytail doesn't exhibit the same behaviour. Is this the issue with the whole package or only the pytail executable? Regardless, can such functionality be implemented? Cheers