fix doctest

Author: GiacomoPope

src/flint/types/fq_default_poly.pyx

@@ -19,7 +19,7 @@ cdef class fq_default_poly_ctx:
     with a finite field `GF(p^d)`.
 
         >>> fq_default_poly_ctx(163, 3)
-        fq_default_poly_ctx(Context for fq_default in GF(163^3)[z]/(z^3 + 7*z + 161))
+        fq_default_poly_ctx(fq_default_ctx(163, 3, 'z', x^3 + 7*x + 161, 'FQ_NMOD'))
     """
     def __cinit__(self):
         pass