Use new_line after path_meta doc comments

CHANGELOG.md

@@ -30,6 +30,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed a comment directly after a string, byte string, or char literal being read as code when checking for a newtype or tuple inside untagged enums or unwrapped newtype variants, which rejected valid input or changed how it was deserialised ([#644](https://github.com/ron-rs/ron/pull/644))
 - Fixed `Value` preallocating its sequence or map from an uncapped size hint when deserialised from a non-RON format, e.g. CBOR, so that a forged length aborted the process ([#647](https://github.com/ron-rs/ron/pull/647))
 - Fixed untyped ranges, e.g. `Value` or untagged enums, rejecting an `inf` or `NaN` end bound after `..` (as in `0.0..inf` and `..NaN`) or a byte literal end bound after a bare `..` (as in `..b'z'`), which broke round-tripping compact ranges with an infinite end bound ([#648](https://github.com/ron-rs/ron/pull/648))
+- Fixed `path_meta` doc comments always ending with `\n` instead of `PrettyConfig::new_line`, which mixed line endings when using e.g. `"\r\n"` ([#649](https://github.com/ron-rs/ron/pull/649))
 
 ### Documentation
 

src/ser/mod.rs

@@ -1576,7 +1576,7 @@ impl<'a, W: fmt::Write> ser::SerializeStruct for Compound<'a, W> {
                     for doc_line in field.doc().lines() {
                         self.ser.output.write_str("/// ")?;
                         self.ser.output.write_str(doc_line)?;
-                        self.ser.output.write_char('\n')?;
+                        self.ser.output.write_str(&config.new_line)?;
                         indent(&mut self.ser.output, config, pretty)?;
                     }
                 }

tests/544_path_meta.rs

@@ -127,3 +127,37 @@ fn serialize_field() {
 ])"#
     );
 }
+
+#[test]
+fn doc_comments_use_new_line() {
+    #[derive(serde::Serialize)]
+    struct Pet {
+        name: &'static str,
+        age: u8,
+    }
+
+    let mut config = PrettyConfig::default().new_line("\r\n");
+
+    config
+        .path_meta
+        .get_or_insert_with(Field::empty)
+        .build_fields(|fields| {
+            fields
+                .field("age")
+                .with_doc("age of the pet\nmust be within range 0..256");
+        });
+
+    let s = ron::ser::to_string_pretty(
+        &Pet {
+            name: "Herbert",
+            age: 7,
+        },
+        config,
+    )
+    .unwrap();
+
+    assert_eq!(
+        s,
+        "(\r\n    name: \"Herbert\",\r\n    /// age of the pet\r\n    /// must be within range 0..256\r\n    age: 7,\r\n)"
+    );
+}