We have it.
https://github.com/PHPFusion/PHPFusion/blob/fde4f588e77c34154b6a11b44bc70307123de60c/includes/theme_functions_include.php#L160
showcopyright() will have breaks.
showcopyright('', TRUE) will not have breaks.
The one in magazine theme - https://github.com/PHPFusion/PHPFusion/blob/Andromeda/themes/Magazine/theme.php#L138, has no breaks, but you can simply alter to fit your preference.
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