python/moz/l10n/formats/ini/serialize.py [43:65]:
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    at_empty_line = True

    def comment(comment: str, meta: Any, standalone: bool) -> Iterator[str]:
        nonlocal at_empty_line
        if trim_comments:
            return
        if meta:
            raise ValueError("Metadata is not supported")
        if comment:
            if standalone and not at_empty_line:
                yield "\n"
            for line in comment.strip("\n").split("\n"):
                if not line or line.isspace():
                    yield "#\n"
                else:
                    line = line.rstrip() + "\n"
                    yield f"#{line}" if line.startswith("#") else f"# {line}"
            if standalone:
                yield "\n"
                at_empty_line = True

    yield from comment(resource.comment, resource.meta, True)
    for section in resource.sections:
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python/moz/l10n/formats/properties/serialize.py [80:102]:
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    at_empty_line = True

    def comment(comment: str, meta: Any, standalone: bool) -> Iterator[str]:
        nonlocal at_empty_line
        if trim_comments:
            return
        if meta:
            raise ValueError("Metadata is not supported")
        if comment:
            if standalone and not at_empty_line:
                yield "\n"
            for line in comment.strip("\n").split("\n"):
                if not line or line.isspace():
                    yield "#\n"
                else:
                    line = line.rstrip() + "\n"
                    yield f"#{line}" if line.startswith("#") else f"# {line}"
            if standalone:
                yield "\n"
                at_empty_line = True

    yield from comment(resource.comment, resource.meta, True)
    for section in resource.sections:
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