fix: metadata-collector listing lints when config documents include comma

clippy_config/src/conf.rs

@@ -550,7 +550,7 @@ define_Conf! {
     /// Lint: PUB_UNDERSCORE_FIELDS
     ///
     /// Lint "public" fields in a struct that are prefixed with an underscore based on their
-    /// exported visibility; or whether they are marked as "pub".
+    /// exported visibility, or whether they are marked as "pub".
     (pub_underscore_fields_behavior: PubUnderscoreFieldsBehaviour = PubUnderscoreFieldsBehaviour::PublicallyExported),
 }
 

clippy_config/src/metadata.rs

@@ -96,6 +96,9 @@ fn parse_config_field_doc(doc_comment: &str) -> Option<(Vec<String>, String)> {
         doc_comment.make_ascii_lowercase();
         let lints: Vec<String> = doc_comment
             .split_off(DOC_START.len())
+            .lines()
+            .next()
+            .unwrap()
             .split(", ")
             .map(str::to_string)
             .collect();