test: normalize CRLF in preset-config golden comparison

Force LF on golden files via .gitattributes and strip CRLF in the
snapshot comparison so the test passes on Windows runners
(core.autocrlf rewrites the text golden to CRLF on checkout).

Author: tamirelazar

.gitattributes

@@ -0,0 +1,4 @@
+# Golden reference files are compared byte-for-byte against generated output
+# that always uses LF. Force LF on checkout so Windows runners (core.autocrlf=true)
+# don't rewrite them to CRLF and break the snapshot tests.
+tests/golden/** text eol=lf

tests/preset_config_snapshot.rs

@@ -73,6 +73,10 @@ fn preset_assembled_configs_match_golden() {
         std::fs::write(GOLDEN, &buf).expect("write golden");
         return;
     }
-    let golden = std::fs::read_to_string(GOLDEN).unwrap_or_default();
+    // Normalize CRLF: git may check the golden out with CRLF on Windows
+    // (core.autocrlf), while `buf` is always built with LF.
+    let golden = std::fs::read_to_string(GOLDEN)
+        .unwrap_or_default()
+        .replace("\r\n", "\n");
     assert_eq!(buf, golden, "assembled preset configs differ from golden");
 }