Conflict with default Compose

[cblp]

<Multi_key> <grave> <grave> combination conflicts with <Multi_key> <grave> <grave> ... combinations from the default X11 Compose, see http://anonscm.debian.org/gitweb/?p=pkg-xorg/lib/libx11.git;a=commit;h=fa2eecca

[bluetech]

There are actually quite a bit of conflicts. Here are warnings that the libxkbcommon Compose implementation spews (with XKB_LOG_LEVEL=debug and en_US.UTF-8 locale): https://gist.github.com/bluetech/ad130434c91ed5809156

There is also one syntax error.