commitablectx: move _date from workingctx

mercurial/context.py

@@ -941,6 +941,10 b' class commitablectx(basectx):'
     def _user(self):
         return self._repo.ui.username()
 
+    @propertycache
+    def _date(self):
+        return util.makedate()
+
     def status(self, ignored=False, clean=False, unknown=False):
         """Explicit status query
         Unless this method is used to query the working copy status, the
@@ -980,10 +984,6 b' class workingctx(commitablectx):'
                 yield f
 
     @propertycache
-    def _date(self):
-        return util.makedate()
-
-    @propertycache
     def _parents(self):
         p = self._repo.dirstate.parents()
         if p[1] == nullid: