Fix bug in categorical gene types

Author: rsomers1998

causal_testing/surrogate/surrogate_search_algorithms.py

@@ -102,7 +102,10 @@ def create_gene_types(
                 if rel_split[1] == ">=":
                     var_space[rel_split[0]]["low"] = int(rel_split[2])
                 elif rel_split[1] == "<=":
-                    var_space[rel_split[0]]["high"] = int(rel_split[2])
+                    if specification.scenario.variables.get(rel_split[0]).datatype == int:
+                        var_space[rel_split[0]]["high"] = int(rel_split[2]) + 1
+                    else:
+                        var_space[rel_split[0]]["high"] = int(rel_split[2])
 
         gene_space = []
         gene_space.append(var_space[surrogate_model.treatment])