[tex-live] [luatex] Spaces in the log: \scrollmode or not, LuaTeX or pdfTeX

[Frank Mittelbach]

Am 20.08.16 um 15:43 schrieb Joseph Wright:

 > [..]

> (and similar for other engines) whilst LuaTeX gives respectively
>
>     This is LuaTeX, Version 0.95.0 (TeX Live 2016)
>      restricted system commands enabled.
>     (./test.tex
>     (./test.tex
>     ))
>     warning  (pdf backend): no pages of output.
>     Transcript written on test.log.
>
> and
>
>     This is LuaTeX, Version 0.95.0 (TeX Live 2016)
>      restricted system commands enabled.
>     (./test.tex (./test.tex))
>     warning  (pdf backend): no pages of output.
>     Transcript written on test.log.
>
> Is there some logic to the variation here?

I think there is not much you can do here other than accept the 
differences (and expect more in the future)

and somehow program around it.

In the 20 years regression testing for LaTeX I remember several 
occasions where spaces popped up in new places (or linebreaks) when a 
new release of web2c was released. This is the same thing and as Hans 
said, lua code will interrupt things and so start new lines in places.

It is a bit surprising that there is a lot of space differences between 
batch and scroll mode but ...

would be nice if there are less, but it is fairly clear that the 
different engines will behave differently here as this is not something 
that matters except when trying to parse the .log file

Guess you need to normalize by hunting for ) as the first char in a line 
combine it with the previous line and then see how far that gets you

frank