[BUG] Overriding background_color of Syntax doesn't include padding

[TomJGooding]

• I've checked docs and closed issues for possible solutions.
• I can't find my issue in the FAQ.

Describe the bug

See Textualize/textual#4227 (reply in thread) for context.

According to the Syntax documentation:

You can override the background color from the theme by supplying a background_color argument to the constructor.

However this doesn't seem to work as expected if the Syntax has padding:

from rich.console import Console
from rich.syntax import Syntax

code = """\
def do_something():
    pass\
"""

console = Console()

syntax = Syntax(
    code,
    lexer="python",
    word_wrap=False,
    indent_guides=True,
    padding=(1, 2),
    theme="material",
    background_color="red",
)

console.print(syntax)

If you set the background_color to the special value "default", this produces a different unexpected result:

Platform

Platform is Linux and tested in various terminal emulators.

$ pip freeze | grep rich
rich==13.6.0

[github-actions]

Thank you for your issue. Give us a little time to review it.

PS. You might want to check the FAQ if you haven't done so already.

This is an automated reply, generated by FAQtory

[github-actions]

I hope we solved your problem.

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