rename __is_gen -> _is_gen

Author: infmagic2047

src/sage/rings/power_series_mpoly.pyx

@@ -65,7 +65,7 @@ cdef class PowerSeries_mpoly(PowerSeries):
 
     def __reduce__(self):
         # do *not* delete old versions.
-        return make_powerseries_mpoly_v0, (self._parent, self.__f, self._prec, self.__is_gen)
+        return make_powerseries_mpoly_v0, (self._parent, self.__f, self._prec, self._is_gen)
 
     def __call__(self, *args, **kwds):
         if len(kwds) == 0 and len(args) == 1:

src/sage/rings/power_series_poly.pyx

@@ -97,7 +97,7 @@ cdef class PowerSeries_poly(PowerSeries):
             sage: f == loads(dumps(f)) # indirect doctest
             True
         """
-        return self.__class__, (self._parent, self.__f, self._prec, self.__is_gen)
+        return self.__class__, (self._parent, self.__f, self._prec, self._is_gen)
 
     def polynomial(self):
         """

src/sage/rings/power_series_ring_element.pxd

@@ -1,7 +1,7 @@
 from sage.structure.element cimport AlgebraElement, RingElement
 
 cdef class PowerSeries(AlgebraElement):
-    cdef char __is_gen
+    cdef char _is_gen
     cdef _prec
     cdef common_prec_c(self, PowerSeries other)
     #_prec(self, RingElement right_r)

src/sage/rings/power_series_ring_element.pyx

@@ -159,7 +159,7 @@ cdef class PowerSeries(AlgebraElement):
              over Finite Field of size 3
         """
         AlgebraElement.__init__(self, parent)
-        self.__is_gen = is_gen
+        self._is_gen = is_gen
         self._prec = prec
 
     def __hash__(self):
@@ -234,7 +234,7 @@ cdef class PowerSeries(AlgebraElement):
             sage: 1*t == t
             True
         """
-        return bool(self.__is_gen)
+        return bool(self._is_gen)
 
     def _im_gens_(self, codomain, im_gens, base_map=None):
         """