cli new: have `--no-edit` print description of the new commit

cli/src/commands/new.rs

···
         }
     }
     num_rebased += tx.mut_repo().rebase_descendants(command.settings())?;
+    if args.no_edit {
+        write!(ui.stderr(), "Created new commit ")?;
+        tx.write_commit_summary(ui.stderr_formatter().as_mut(), &new_commit)?;
+        writeln!(ui.stderr())?;
+    } else {
+        tx.edit(&new_commit).unwrap();
+        // The description of the new commit will be printed by tx.finish()
+    }
     if num_rebased > 0 {
         writeln!(ui.stderr(), "Rebased {num_rebased} descendant commits")?;
-    }
-    if !args.no_edit {
-        tx.edit(&new_commit).unwrap();
     }
     tx.finish(ui)?;
     Ok(())

cli/tests/test_new_command.rs

···
     // Same test with `--no-edit`
     test_env.jj_cmd_ok(&repo_path, &["undo"]);
     let (stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["new", "main", "@", "--no-edit"]);
-    // TODO(ilyagr): In this situation, `new` should probably report the identity of
-    // the newly created commit.
     insta::assert_snapshot!(stdout, @"");
-    insta::assert_snapshot!(stderr, @"");
+    insta::assert_snapshot!(stderr, @r###"
+    Created new commit znkkpsqq 200ed1a1 (empty) (no description set)
+    "###);
     insta::assert_snapshot!(get_log_output(&test_env, &repo_path), @r###"
     ◉    200ed1a14c8acf09783dafefe5bebf2ff58f12fd
     ├─╮