fix: make roots doctests compatible with latest Flint

Author: oscarbenjamin

src/flint/types/acb_poly.pyx

@@ -349,13 +349,13 @@ cdef class acb_poly(flint_poly):
         The input polynomial must be squarefree and sufficiently
         accurate. Raises an exception if unsuccessful.
 
-            >>> for c in acb_poly.from_roots([1,2,3,4,5]).roots(1e-10): print(c)
+            >>> for c in acb_poly.from_roots([1,2,3,4,5]).roots(1e-10): print(float(c.real))
             ...
-            [1.00000000000000 +/- 7.71e-18] + [+/- 7.59e-18]j
-            [2.00000000000000 +/- 1.18e-16] + [+/- 1.16e-16]j
-            [3.00000000000000 +/- 4.24e-16] + [+/- 4.22e-16]j
-            [4.00000000000000 +/- 7.21e-16] + [+/- 7.00e-16]j
-            [5.00000000000000 +/- 2.41e-16] + [+/- 2.24e-16]j
+            1.0
+            2.0
+            3.0
+            4.0
+            5.0
             >>> for c in acb_poly.from_roots([1,2,2,4,5]).roots(1e-10): print(c)
             ...
             Traceback (most recent call last):

src/flint/types/fmpz_poly.pyx

@@ -391,13 +391,13 @@ cdef class fmpz_poly(flint_poly):
             >>> fmpz_poly([2,0,1]).complex_roots()
             [([1.41421356237310 +/- 4.96e-15]j, 1), ([-1.41421356237310 +/- 4.96e-15]j, 1)]
             >>> for c, m in (fmpz_poly([2,3,4]) * fmpz_poly([5,6,7,11])**3).complex_roots():
-            ...     print((c,m))
+            ...     print(f'{float(c.real)} + {float(c.imag)}*j : {m}')
             ...
-            ([-0.375000000000000 +/- 1.0e-19] + [0.599478940414090 +/- 5.75e-17]j, 1)
-            ([-0.375000000000000 +/- 1.0e-19] + [-0.599478940414090 +/- 5.75e-17]j, 1)
-            ([-0.735284727404843 +/- 4.11e-16], 3)
-            ([0.0494605455206031 +/- 1.33e-17] + [0.784693167647185 +/- 2.85e-16]j, 3)
-            ([0.0494605455206031 +/- 1.33e-17] + [-0.784693167647185 +/- 2.85e-16]j, 3)
+            -0.375 + 0.5994789404140899*j : 1
+            -0.375 + -0.5994789404140899*j : 1
+            -0.7352847274048426 + 0.0*j : 3
+            0.04946054552060311 + 0.7846931676471847*j : 3
+            0.04946054552060311 + -0.7846931676471847*j : 3
 
         """
         cdef fmpz_poly_factor_t fac