fix issue295

Author: Rohan-Salwan

fire/helptext.py

@@ -124,12 +124,12 @@ def ReturnAllArgs(Inherit_classes_list):
     Return: list of all arguments which is retrieved from parent classes.
   """
   all_args = []
-  if len(Inherit_classes_list)>2:
-    for classes in Inherit_classes_list:
-      argspec_tuple=inspect.getargspec(classes)
-      args_list=argspec_tuple[0]
-      for arg in args_list[1:]:
-        all_args.append(arg)
+
+  for classes in Inherit_classes_list:
+    argspec_tuple=inspect.getargspec(classes)
+    args_list=argspec_tuple[0]
+    for arg in args_list[1:]:
+      all_args.append(arg)
 
   return all_args