[luatex] Minor formatting bugs in output

[Taco Hoekwater]

Hi Joseph,

On 24 May 2014, at 17:23, Joseph Wright <joseph.wright at morningstar2.co.uk> wrote:

> Hello all,
> 
> Setting up some tests which use log file differences, I've run across a
> few oddities with LuaTeX. These may or may not be bugs: what I'm after
> is status on them. (All tested with an up-to-date TL2014 pretest, luatex
> executable.)
> 
> First one is the 'more help text for something like:
> 
>    \def\foo{#1}
> 
> which with LuaTeX reads:
> 
>    You meant to type ## instead of #, right?
>    Or maybe a } was forgotten somewhere earlier, and things
>    are all screwed up? I''m going to assume that you meant ##.
> 
> Notice the extra "'" in "I'm" on on the last line. Clear bug, I think :-)

Yeah, that one was clear and easy, already fixed.

> 
> The second one is
> 
>    \immediate\write0{\the\foo}
> 
> where if we scroll down the log a bit we get
> 
>    ! Forbidden control sequence found while scanning text of \write.
>    <inserted text>
>                    }
>    <to be read again>
>                       \endwrite
>    <inserted text> }\endwrite
> 
>    l.5 \immediate\write0{\the\foo}
> 
>    ?
>    0
>    ! Missing { inserted.
>    <to be read again>
> 
> The difference this time is a space: with pdfTeX/XeTeX that "0" has a
> space after it, but with LuaTeX it doesn't. No idea if this is deliberate!

Neither do I.  Tracked as http://tracker.luatex.org/view.php?id=901

> 
> Third one is more serious or at least surprising:
> 
>    \expandafter\show\csname foo#\endcsname
> 
> gives
> 
>> \foo##=\relax.
>    <recently read> \foo##
> 
> with LuaTeX but
> 
>> \foo#=\relax.
>    <recently read> \foo#
> 
> with pdfTeX/XeTeX. The pdfTeX behaviour allows for use of 'odd' catcodes
> in csnames, whereas the LuaTeX behaviour means a test would be needed.

Neither do I.  Tracked as http://tracker.luatex.org/view.php?id=902

Groetjes,
Taco