use explicit property name when creating nodes for "Grapheme_Cluster_Break=Extend"
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66021 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
use explicit property name when creating nodes for "Grapheme_Cluster_Break=Extend"
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66021 b2dd03c8-39d4-4d8f-98ff-823fe69b080e