Patch with "signature" might not parsed correctly

[wolfv]

A patch with a "signature" is not parsed correctly.

Delphes-ClosestPair2D-fwdDeclaration.patch

[wolfv]

--[no-]signature=<signature>
Add a signature to each message produced. Per RFC 3676 the signature is separated from the body by a line with '-- ' on it. If the signature option is omitted the signature defaults to the Git version number.

[matthewfeickert]

Thanks very much, @wolfv!

[wolfv]

Actually this might be a regression from patch: prefix-dev/rattler-build#1633

[matthewfeickert]

Also affecting conda-forge/root-feedstock#292 (though I realize that this affects most feedstocks with patches).