basefilectx: move _filelog from filectx

mercurial/context.py

@@ -419,6 +419,10 b' class basefilectx(object):'
     def __new__(cls, repo, path, *args, **kwargs):
         return super(basefilectx, cls).__new__(cls)
 
+    @propertycache
+    def _filelog(self):
+        return self._repo.file(self._path)
+
 class filectx(basefilectx):
     """A filecontext object makes access to data related to a particular
        filerevision convenient."""
@@ -469,10 +473,6 b' class filectx(basefilectx):'
             return changectx(self._repo.unfiltered(), self._changeid)
 
     @propertycache
-    def _filelog(self):
-        return self._repo.file(self._path)
-
-    @propertycache
     def _changeid(self):
         if '_changeid' in self.__dict__:
             return self._changeid