Relocate special case logic

entries/jitenon.py

@@ -73,9 +73,6 @@ class Jitenon:
 
     def _headwords(self):
         words = []
-        if self.expression == "金棒引き・鉄棒引き":
-            # special case
-            return [["金棒引き", "かなぼうひき"], ["金棒引き", "かなぼうひき"]]
         for yomikata in self.__yomikatas():
             headword = [self.expression, yomikata]
             if headword in words:

entries/jitenon_kotowaza.py

@@ -32,3 +32,10 @@ class JitenonKotowaza(Jitenon):
             ]
             terms.append(term)
         return terms
+
+    def _headwords(self):
+        if self.expression == "金棒引き・鉄棒引き":
+            return [["金棒引き", "かなぼうひき"],
+                    ["鉄棒引き", "かなぼうひき"]]
+        else:
+            return Jitenon._headwords(self)