vim: Copy comment to new lines with o/O (#19766)

Co-Authored-By: Kurt Wolf <kurtwolfbuilds@gmail.com>

Closes: #4691

Closes #ISSUE

Release Notes:

- vim: o/O now respect `extend_comment_on_newline`

crates/editor/src/test/editor_lsp_test_context.rs

@@ -123,6 +123,7 @@ impl EditorLspTestContext {
                     path_suffixes: vec!["rs".to_string()],
                     ..Default::default()
                 },
+                line_comments: vec!["// ".into(), "/// ".into(), "//! ".into()],
                 ..Default::default()
             },
             Some(tree_sitter_rust::LANGUAGE.into()),