Consider the negation operator (!) to be a word even if it is not followed
by whitespace.  This allows "optional !foo" which is what most programmers
are naturally going to tend to do as opposed to "optional ! foo".


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274924 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f