Reformat (minor, after replacing black with ruff)

Black dependency created a dependabot warning and couldn't be bumped since it collided with pathspec dependencies. Since ruff can also format, black is not needed. But we now have these small format changes, mostly in test files

test/solidlsp/zig/test_zig_basic.py

@@ -193,9 +193,9 @@ class TestZigLanguageServer:
 
                     # Verify exact location in main.zig (line 8, 0-indexed: 7)
                     main_ref_line = main_refs[0]["range"]["start"]["line"]
-                    assert (
-                        main_ref_line == 7
-                    ), f"Calculator reference in main.zig should be at line 8 (0-indexed: 7), found at line {main_ref_line + 1}"
+                    assert main_ref_line == 7, (
+                        f"Calculator reference in main.zig should be at line 8 (0-indexed: 7), found at line {main_ref_line + 1}"
+                    )
 
     @pytest.mark.parametrize("language_server", [Language.ZIG], indirect=True)
     def test_cross_file_references_within_file(self, language_server: SolidLanguageServer) -> None: