The traditional French double quotation marks, « and », are called guillemets. They are used in the scripts of many modern languages, including some forms of Chinese (as 《 and 》 in restricted contexts).
The standard LaTeX commands to produce them, however, are
e for the
o leads to a compiler error. It seems that a non-standard spelling of guillemet influence the choice of the LaTeX command.
My Petit Robert (vintage 1991) defines guillemot: "Oiseau palmipède voisin du pingouin, habitant les régions arctiques [Web-footed bird related to the penguin, inhabiting arctic regions]". Perhaps this is all a plot to plant Linux imagery in people's LaTeX code.
I originally posted this comment here: http://wp.me/p1OF2a-cU .