Hello,
The same problem will surface just in another scenario.
And I assume the tex file is automatically generated from texinfo I guess.
So it should probably be fixed in texinfo then.
But I read that texinfo uses plain tex, and not latex, so a latex solution
won't work...
Regards,
Erich
On Wed, Jul 15, 2015 at 10:31 PM, Jürgen Lange <juergen.la...@unitybox.de>
wrote:
> Hello Erich,
> the problem in enigma-ref.pdf is simply, that the font is mainly Original
> Tex encoding (OT1).
> A solution with underscores would be: \usepackage[T1]{fontenc}
> https://tex.stackexchange.com/questions/42777/copy-pasting-of-underscore
>
> Regards,
> Jürgen
>
> Am 15.07.2015, 20:58 Uhr, schrieb Erich Schubert <erich.schub...@gmail.com
> >:
>
> Hello all,
> Font and character encodings are tricky, and there are *many* copy and
> paste issues when trying to copy from PDF files.
> In particular from files that are well generated. In my experience
> copy&paste is flawed in 90% of the PDF files.
> Just today I had a similar issue with the regular dash: - of which at
> least 4 different versions exist in good fonts.
>
> Consider ligatures. If you want a good typography, you want ligatures, but
> this can break e.g. email adresses etc.
>
> Furthermore, there are diacritics, which are often represented internally
> as composed characters, but they may or may not be encoded this way in your
> font.
>
> Oh, and don't forget about quotation marks!
>
> See:
> https://en.wikipedia.org/wiki/Typographic_ligature
> https://en.wikipedia.org/wiki/Diacritic
>
> There is little you can do to ensure perfect copy&paste from PDF across
> different viewers.
> And it clearly is not worth the effort. It's likely not an error in the
> source.
>
> Tl;dr: never assume you can copy&paste from a PDF file.
> In particular not from a file that looks good...
>
> If you want to copy some code fragment, copy it from the source files, not
> a PDF.
> (Don't blame me, I didn't invent typography or the PDF file format which
> is designed for visuals but not for copy&paste.)
>
> Regards,
> Erich
>
>
>
>
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>
>
--
best regards,
Erich Schubert
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