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On 07/31/2017 10:45 AM, Will Robertson wrote:
> Hi Werner,
>
> The first thing you can do is to ask the fontspec person to update the package :)
> But of course you have a broader point:
>
>>
>> To satisfy the LPPL I thought the right solution is to copy
>> fontspec.sty' to fontspec-patched.sty', then applying the following
>> change:
>
> In fact, requiring a change to the filename is no longer written explicitly into the LPPL.
> (Long story, don’t ever ask Frank how many emails it involved.)
>
> You would be well within your rights to add something like the following to the top of your patched version of fontspec.sty:
>
>     \typeout{This is Werner Lemberg’s altered copy of fontspec vX.X.}
>
> The most important thing is that the altered code is clearly differentiated to the user as being altered from its original.
>
> * * *
>
> This would be done with something like:
>
>
> (Look into memoir.cls’s \EmulatedPackage code for more details.)
>
> * * *
>
> Hope this helps,
> Will
>

It's slightly better to change the \ProvidesPackage line so that the
change shows up in the \listfiles.

Bruno