part of merge

src/main/java/catdata/aql/exp/CombinatorParser.java

 package catdata.aql.exp;
 
+import java.io.IOException;
+import java.io.Reader;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -36,6 +39,7 @@ import catdata.aql.exp.EdsExp.EdsExpVar;
 import catdata.aql.exp.EdsExpRaw.EdExpRaw;
 import catdata.aql.exp.GraphExp.GraphExpRaw;
 import catdata.aql.exp.GraphExp.GraphExpVar;
+import catdata.aql.exp.InstExpQueryQuotient;
 import catdata.aql.exp.InstExp.InstExpAnonymize;
 import catdata.aql.exp.InstExp.InstExpChase;
 import catdata.aql.exp.InstExp.InstExpCoEq;
@@ -315,7 +319,7 @@ public class CombinatorParser implements IAqlParser {
 								options.between(token("{"), token("}")).optional())
 						.map(x -> new InstExpCoEval(x.b, x.c, x.d == null ? new LinkedList<>() : x.d));
 
-		Parser ret = Parsers.or(queryQuotientExpRaw(), sigma_chase, l2, pi, frozen, instExpCsvQuot(), instExpJdbcQuot(), instExpCoProd(), instExpRand(),
+		        Parser ret = Parsers.or(queryQuotientExpRaw(), sigma_chase, l2, pi, frozen, instExpCsvQuot(), instExpJdbcQuot(), instExpCoProd(), instExpRand(),
 				instExpCoEq(), instExpJdbcAll(), chase, instExpJdbc(), empty, instExpRaw(), var, sigma, delta, distinct,
 				eval, colimInstExp(), dom, anon, cod, instExpCsv(), coeval, parens(inst_ref), instExpQuotient());