feat: fence review excerpts with language tags

src/review.rs

@@ -279,9 +279,24 @@ impl Review {
             .filter(|comment| all || !comment.resolved)
         {
             let anchor = &comment.anchor;
+            let excerpt = anchor.excerpt();
+            let language =
+                match crate::syntax::language_id(Some(&anchor.path), anchor.content.lines().next())
+                {
+                    Some("honey") => "hon",
+                    language => language.unwrap_or(""),
+                };
+            let fence_width = 3.max(
+                excerpt
+                    .split(|ch| ch != '`')
+                    .map(str::len)
+                    .max()
+                    .unwrap_or(0)
+                    + 1,
+            );
             writeln!(
                 text,
-                "\nComment {} [{}] {} ({}) {}:{}–{}:{} @ {}\n{}\n{}",
+                "\nComment {} [{}] {} ({}) {}:{}–{}:{} @ {}",
                 comment.id,
                 if comment.resolved {
                     "resolved"
@@ -298,10 +313,13 @@ impl Review {
                 anchor.end.row,
                 anchor.end.column,
                 anchor.revision,
-                anchor.excerpt(),
-                comment.body,
             )
             .unwrap();
+            write!(text, "{:`<fence_width$}{language}\n{excerpt}", "").unwrap();
+            if !excerpt.ends_with('\n') {
+                text.push('\n');
+            }
+            writeln!(text, "{:`<fence_width$}\n{}", "", comment.body).unwrap();
         }
         text
     }