Make small refactor

Author: SudoBobo

graphql/query_to_avro.lua

@@ -176,19 +176,19 @@ union_to_avro = function(fieldType, subSelections, context)
         if box_sub_selections.selectionSet.selections[1].selectionSet ~= nil then
             -- Object GraphQL type case.
             type_sub_selections =
-                box_sub_selections.selectionSet.selections[1].selectionSet.selections
+            box_sub_selections.selectionSet.selections[1].selectionSet.selections
         else
             -- Scalar GraphQL type case.
             type_sub_selections = box_sub_selections.selectionSet.selections[1]
         end
 
         if is_multihead then
             local avro_type = gql_type_to_avro(type.kind,
-            type_sub_selections, context, {is_nullable = true})
+                type_sub_selections, context, {is_nullable = true})
             table.insert(result.fields, {name = type.name, type = avro_type})
         else
             table.insert(result, gql_type_to_avro(type.kind,
-            type_sub_selections, context))
+                type_sub_selections, context))
         end
     end
 
@@ -224,7 +224,7 @@ local function field_to_avro(object_type, fields, context)
             assert(d.kind == "directive")
             check(d.name.value, "directive.name.value", "string")
             assert(d.name.value == "include" or d.name.value == "skip",
-            "Only 'include' and 'skip' directives are supported for now")
+                "Only 'include' and 'skip' directives are supported for now")
         end
         if type(fieldTypeAvro) == "string" then
             if string.sub(fieldTypeAvro, -1) ~= '*' then