Add parentheses to string representation.

libwccl/ops/match/conditions/isannotatedas.cpp

@@ -46,13 +46,13 @@ MatchResult IsAnnotatedAs::apply(const ActionExecContext& context) const
 std::string IsAnnotatedAs::to_string(const Corpus2::Tagset& tagset) const
 {
 	std::ostringstream os;
-	os << name() << "(" << chan_name_ << ")";
+	os << name() << "(\"" << chan_name_ << "\")";
 	return os.str();
 }
 
 std::ostream& IsAnnotatedAs::write_to(std::ostream& os) const
 {
-	return os << name() << "(" << chan_name_ << ")";
+	return os << name() << "(\"" << chan_name_ << "\")";
 }
 
 } /* end ns Wccl */