in serialization rename op to term

app/models/logic.rb

@@ -1,6 +1,6 @@
 module Logic
   def self.from_h(h)
-    class_from_name(h['op']).from_h(h)
+    class_from_name(h['term']).from_h(h)
   end
 
   def self.from_json(s)

app/models/logic/binary_operator.rb

@@ -8,7 +8,7 @@ class Logic::BinaryOperator < Logic::Term
 
   def to_h
     {
-      "op" => self.class.name,
+      "term" => self.class.name,
       "left" => @left.to_h,
       "right" => @right.to_h,
       "id" => @id

app/models/logic/champ_value.rb

@@ -60,7 +60,7 @@ class Logic::ChampValue < Logic::Term
 
   def to_h
     {
-      "op" => self.class.name,
+      "term" => self.class.name,
       "stable_id" => @stable_id,
       "id" => @id
     }

app/models/logic/constant.rb

@@ -34,7 +34,7 @@ class Logic::Constant < Logic::Term
 
   def to_h
     {
-      "op" => self.class.name,
+      "term" => self.class.name,
       "value" => @value,
       "id" => @id
     }

app/models/logic/empty.rb

@@ -11,7 +11,7 @@ class Logic::Empty < Logic::Term
 
   def to_h
     {
-      "op" => self.class.name,
+      "term" => self.class.name,
       "id" => @id
     }
   end

app/models/logic/n_ary_operator.rb

@@ -8,7 +8,7 @@ class Logic::NAryOperator < Logic::Term
 
   def to_h
     {
-      "op" => self.class.name,
+      "term" => self.class.name,
       "operands" => @operands.map(&:to_h),
       "id" => @id
     }