python3-gmpy2: patch and rebuild for mpfr-4.2.1

srcpkgs/python3-gmpy2/patches/68a6b489c3d8d95b2658a1ed884fb99f4bd955c1.patch

@@ -0,0 +1,31 @@
+From 68a6b489c3d8d95b2658a1ed884fb99f4bd955c1 Mon Sep 17 00:00:00 2001
+From: Sergey B Kirpichev <[email protected]>
+Date: Sun, 3 Sep 2023 02:35:19 +0300
+Subject: [PATCH] Exclude MPFR workaround for MPFR >= 4.2.1
+
+Co-authored-by: Vincent Lefevre <[email protected]>
+
+Closes #418
+---
+ src/gmpy2_format.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/gmpy2_format.c b/src/gmpy2_format.c
+index 3e450c96..303bb7bf 100644
+--- a/src/gmpy2_format.c
++++ b/src/gmpy2_format.c
+@@ -592,12 +592,14 @@ GMPy_MPC_Format(PyObject *self, PyObject *args)
+     if (mpcstyle)
+         strcat(tempbuf, " ");
+     else {
++#if MPFR_VERSION < MPFR_VERSION_NUM(4,2,1)
+         /* Need to insert + if imag is nan or +inf. */
+         if (mpfr_nan_p(mpc_imagref(MPC(self))) ||
+             (mpfr_inf_p(mpc_imagref(MPC(self))) &&
+              mpfr_sgn(mpc_imagref(MPC(self))) > 0)) {
+             strcat(tempbuf, "+");
+         }
++#endif
+     }
+     strcat(tempbuf, imagbuf);
+     if (strlen(imagbuf) < 50 &&