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/editor.rs

@@ -223,6 +223,7 @@ pub fn render_parsed_markdown(
                 }
             }),
     );
+    // hello
 
     let mut links = Vec::new();
     let mut link_ranges = Vec::new();
@@ -3784,6 +3785,9 @@ impl Editor {
     pub fn newline_below(&mut self, _: &NewlineBelow, cx: &mut ViewContext<Self>) {
         let buffer = self.buffer.read(cx);
         let snapshot = buffer.snapshot(cx);
+        //
+        //
+        //
 
         let mut edits = Vec::new();
         let mut rows = Vec::new();

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()),