[$] Exposing Trojan Source exploits in Emacs

While the "Trojan Source" vulnerabilitieshave, thus far, generated far more publicity than examples of actualexploits, addressing the problem still seems like a good thing to do.There are several places where defenses could be put into place; texteditors, being the place where developers look at a lot of code, are oneobvious example. The discussion of how to enhance Emacs in this regard hasmade it clear, though, that there are multiple opinions about how an editorshould flag potential attacks.