Missing \protected@file@percent

[Rimole]

babel has

\def\babel@aux#1#2{% \select@language{#1}% \bbl@foreach\BabelContentsFiles{% \relax -> don't assume vertical mode \@writefile{##1}{\babel@toc{#1}{#2}\relax}}}% TODO - plain?

(that should be \@ no space writefile, but github automatically changes it to @WriteFile) which should be

\def\babel@aux#1#2{% \select@language{#1}% \bbl@foreach\BabelContentsFiles{% \relax -> don't assume vertical mode \@writefile{##1}{\babel@toc{#1}{#2}\relax\protected@file@percent}}}% TODO - plain?

(that should be \@ no space writefile, but github automatically changes it to @WriteFile) because it is writing to the table of contents (see "\protected@file@percent" in source2e.pdf). Thank you!

[jbezos]

Please, post a MWE showing an actual issue. In principle, a % after \relax is unnecessary, because with the latter spaces and eols are gobbled. On the other hand, perhaps it would be sensible to replace \relax by \protected@file@percent.

[FrankMittelbach]

If I remember correctly I used \protected@file@percent back then for two reasons:

• to ensure not to get spaces if in hmode (that could be done equally with \relax)
• but also so that an entry has a chance to look at the next without the need to account for a \relax or not But my memory is hazy ... could be that there is more documentation in the relevant part of the source (actually I think it had something to do how titletoc was behaving :-)

[u-fischer]

@FrankMittelbach yes, we added a real % to avoid troubles with look aheads, see egreg comment here: https://github.com/latex3/latex2e/issues/73

[jbezos]

In this case the lookahead is not relevant, because \babel@toc is a babel internal macro, which relies on the \relax trick. I’ve doubts there is an actual issue, but who knows.

[jbezos]

I’m closing this issue because it isn’t an actual issue.