diffoscope: fix build, 178 -> 179

ChangeLog: https://diffoscope.org/news/diffoscope-179-released/

Also fixed the build by disabling a failing test because of
`file-v5.40`[1][2].

[1] Upstream bug: https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/271
[2] Similar to: 3f906acae3

pkgs/tools/misc/diffoscope/default.nix

@@ -9,11 +9,11 @@
 # Note: when upgrading this package, please run the list-missing-tools.sh script as described below!
 python3Packages.buildPythonApplication rec {
   pname = "diffoscope";
-  version = "178";
+  version = "179";
 
   src = fetchurl {
     url = "https://diffoscope.org/archive/diffoscope-${version}.tar.bz2";
-    sha256 = "sha256-uJbTQshf7vRd6EyaaV0itJVrMc/6o+pPXhtUgrjFnzM=";
+    sha256 = "sha256-SIFLWlmENuhgwG0YbIDTWG6uCHEfuoc0IMVz4cp5NX4=";
   };
 
   outputs = [ "out" "man" ];
@@ -66,6 +66,10 @@ python3Packages.buildPythonApplication rec {
     "test_diff_meta"
     "test_diff_meta2"
     "test_obj_no_differences"
+
+    # Failing because of file-v5.40 has a slightly different output.
+    # Upstream issue: https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/271
+    "test_text_proper_indentation"
   ];
 
   meta = with lib; {