Doctest also the parent of floor division

src/sage/rings/polynomial/polynomial_template.pxi

@@ -1,11 +1,15 @@
 """
 Polynomial Template for C/C++ Library Interfaces
 """
+
 #*****************************************************************************
 #       Copyright (C) 2008 Martin Albrecht <M.R.Albrecht@rhul.ac.uk>
 #       Copyright (C) 2008 Robert Bradshaw
 #
-#  Distributed under the terms of the GNU General Public License (GPL)
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
@@ -425,6 +429,10 @@ cdef class Polynomial_template(Polynomial):
             x
             sage: 1 // x
             0
+            sage: parent(x // 1)
+            Univariate Polynomial Ring in x over Finite Field of size 47
+            sage: parent(1 // x)
+            Univariate Polynomial Ring in x over Finite Field of size 47
         """
         cdef Polynomial_template _right = <Polynomial_template>right