Add EPANET2 input format

api/s9_demands.py

@@ -85,6 +85,11 @@ def set_demand(name: str, cs: ChangeSet) -> ChangeSet:
     return execute_command(name, set_demand_cmd(name, cs))
 
 
+#--------------------------------------------------------------
+# [EPANET2]
+#    MULTIPLY  factor
+#    node  base_demand  (pattern)
+#--------------------------------------------------------------
 class InpDemand:
     def __init__(self, line: str) -> None:
         tokens = line.split()