keymap fr: key for "«" is "Z" instead of "W"

This is about the basic "French" keyboard layout in X11.

The problem is that the key mapping for "«" and "»" are not side by side on this layout.
The bug is that "«" is mapped to the Z key instead of the W key.

The keys W and X are side by side on a french keyboard (this is the AZERTY layout, where Z and W are inverted compared to a QWERTY keyboard).

From /usr/share/X11/xkb/symbols/fr:
line 24: key <AD02> { [ z, Z, guillemotleft, less ] };
line 35: key <AB01> { [ w, W, lstroke, Lstroke ] };
line 55: key <AB02> { [ x, X, VoidSymbol, guillemotright ] };

Note that the oss variant of fr does not have this bug (but as it has the bug 188342, this is not really a better alternative). Keys W (AB01) and X (AB02) are used for guillemotleft and guillemotright.