For LaTeX 2025-06-01 marginfix needs an update

[FrankMittelbach]

As discussed in issue #19 marginfix's patching of \@combinefloats is problematical as we have plans to retire this command. With 2025-06 LaTeX will use a reworked output routine with a number of hooks and socketswhich no longer uses this command but instead uses \@outputbox@attachfloats. This means the patch goes nowhere. In the long run we should and will provide additional hooks that can then also be used by marginfix.

For the short run to keep the package working when 2025-06 comes along the following can be done: After patching \@combinefloats in the package do:

\IfFormatAtLeastT{2025-06-01}{\let \@outputbox@attachfloats \@combinefloats}

i.e., make sure that both have the same definition, that is that it contains \MFX@combinefloats@before.

[FrankMittelbach]

In fact you can most likely just use \let \@outputbox@attachfloats \@combinefloats without the conditional around it