Well Liberty does not create characters so those characters are in the file. Why? It is likely a Unicode file with a BOM file marker. Liberty is natively ASCII. So you have the solution, read it and dump it.
I agree. I just checked a few files. IF the file was created with Liberty BASIC the anomaly DOES NOT appear. IF the file was made by DocPad, it appears. IF the file was made by Notepad, it DOES NOT appear.
Discovered the editor DocPad was set to UTC-8 instead of ASCII. HOW it got changed, I don't know. (One of the problems of having so many options I suppose.)
This is good. DocPad has been my Editor of choice for awhile. It has a lot of odd options that I find useful (Alphabetize, Discard duplicate paragraphs, Trim trailing spaces, Jump to line and even Convert Case (Upper and Lower).