Fix console.capture context to not print empty line in jupyter

CHANGELOG.md

@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [13.9.5]
+
+### Fixed
+- Fixed `console.capture` context printing empty line in jupyter https://github.com/Textualize/rich/pull/3474
+
 ## [13.9.4] - 2024-11-01
 
 ### Changed

rich/console.py

@@ -2032,7 +2032,9 @@ def _write_buffer(self) -> None:
                 if self.is_jupyter:  # pragma: no cover
                     from .jupyter import display
 
-                    display(self._buffer, self._render_buffer(self._buffer[:]))
+                    output = self._render_buffer(self._buffer[:])
+                    if output and len(output) > 0:
+                        display(self._buffer, output)
                     del self._buffer[:]
                 else:
                     if WINDOWS:

tests/test_console.py

@@ -967,6 +967,14 @@ def test_force_color_jupyter():
     assert not console.is_terminal
 
 
+@mock.patch("rich.jupyter.display")
+def test_capture_not_print_empty_line_jupyter(display: mock.MagicMock):
+    console = Console(force_jupyter=True)
+    with console.capture():
+        pass
+    display.assert_not_called()
+
+
 def test_force_color():
     console = Console(
         file=io.StringIO(),