dashes in chef mysql::server cookbook attribute names

dash-doh.txt

$ cat server.rb | cut -f 1 -d '=' | grep -
# Copyright 2008-2009, Opscode, Inc.
#     http://www.apache.org/licenses/LICENSE-2.0
default['mysql']['auto-increment-increment']
default['mysql']['auto-increment-offset']
default['mysql']['tunable']['character-set-server']
default['mysql']['tunable']['collation-server']
default['mysql']['tunable']['open-files-limit']
default['mysql']['tunable']['open-files']
default['mysql']['tunable']['skip-character-set-client-handshake']
default['mysql']['tunable']['skip-name-resolve']
default['mysql']['tunable']['skip-innodb-doublewrite']
default['mysql']['tunable']['transaction-isolation']