Behavior of select by word have change and now it is selecting character it did not previously. For instance i show tab as :

"»·······"

Now any word with a such a prefix will allow select all weird non ascii character which sounds utterly broken to me. I see terminal as primary interface for editing source file in which ascii is the dominant and often langage enforced only valid character set. The terminal should select word only containing ascii character so langage like c, c++, java, ... are easy to work with using the terminal.