python3Packages.mat2: fix tests under python 3.14 (#518707)

pkgs/development/python-modules/mat2/default.nix

@@ -5,6 +5,7 @@
   pytestCheckHook,
   fetchFromGitHub,
   fetchpatch,
+  fetchpatch2,
   replaceVars,
   exiftool,
   ffmpeg,
@@ -55,6 +56,16 @@ buildPythonPackage rec {
       url = "https://github.com/jvoisin/mat2/commit/00b4f110711754496932c59d5af3c0b2ed694484.patch";
       hash = "sha256-5h/nM1dK8HmYtoIBVGOvUegMFBpGxcfpn5O6QrjLi9M=";
     })
+    # Loosen test_climat2 assertions split across terminal-width boundaries.
+    (fetchpatch2 {
+      url = "https://github.com/jvoisin/mat2/commit/690e01d475117a4e0c85f26154b26ef332f036be.patch?full_index=1";
+      hash = "sha256-pDbY3E6BPp20orDOx7zxhCdAB+nAdpddTYjPYHStVLc=";
+    })
+    # Fix test_climat2 under Python 3.14+ argparse usage formatting.
+    (fetchpatch2 {
+      url = "https://github.com/jvoisin/mat2/commit/05f34a17695be65b1ad9782911f87e000de8fc8b.patch?full_index=1";
+      hash = "sha256-rIaXocT+LKM2De5iBPIPoBdFbdd17TJJPyFrPzNAJF0=";
+    })
   ];
 
   postPatch = ''