I had a similar problem. Copied a code snippet. Ruby started complaining about an undefined function. After nearly going mad, and then looking at the source thr

I had a similar problem. Copied a code snippet. Ruby started complaining about an undefined function. After nearly going mad, and then looking at the source through a hex editor, you could see Unicode whitespace. I have yet to forgive ruby or Unicode whitespace. Or the chat utility from whence I copied.