Changed default match vector name from $m_M to$ m:_M

libwccl/parser/grammar.g

@@ -248,7 +248,7 @@ parse_match_rule
 	returns [boost::shared_ptr<Expression> ret_match]
 {
 	Variables vars;
-	vars.get_put<Match>("$m_M");
+	vars.get_put<Match>("$m:_M");
 }
 	: ret_match = match_rule_operator[tagset, vars] 
 ;
@@ -1718,7 +1718,7 @@ match_apply_operator
 	[const Corpus2::Tagset& tagset, Variables& vars]
 	returns [boost::shared_ptr<ApplyOperator> ret_op]
 {
-	VariableAccessor<Match> matches = vars.create_accessor<Match>("$m_M");;
+	VariableAccessor<Match> matches = vars.create_accessor<Match>("$m:_M");;
 	boost::shared_ptr<const MatchOperator> match_op;
 	boost::shared_ptr<std::vector<boost::shared_ptr<MatchAction> > > actions;
 	boost::shared_ptr<std::vector<boost::shared_ptr<Function<Bool> > > > conditions;