Hello list,

About two months ago (2020-08-26) I described a difference between LMTX and MkIV in the setting of index registers entries, and more particularly, in the trimming of text to fit the available width therein. I have now created a smallish example to demonstrate the problem.

I do notice that the problem is very sensitive to the width settings, and slight variations in width create different results with both engines.

This ConTeXt input:

\definepapersize [pinched crown quarto]
                 [width=6.69in,
                  height=9.61in]
\setuppapersize  [pinched crown quarto]
\setuplayout     [width=fit,
                  backspace=1.4in,        cutspace=1in,
                  leftmargin=0.65in,      rightmargin=0.65in]

\setupregister   [index]
                 [n=2, balance=no, maxwidth=4cm]

\starttext

\startchapter[title={Index Test}]

\index{Anonymous+Felix quem faciunt aliena pericula cautum}
\index{{Diderot, Denis}+Et des boyaux du dernier prêtre, Serrons le cou du dernier roi}
\index{{Dunne, Finley Peter}+Thrust ivrybody, but cut th’ ca-ards}
\index{Eisenhower+Dwight D.+influence … by the military-industrial complex}
\index{Eisenhower+Dwight D.+plundering, for our own ease and convenience, the precious resources of tomorrow}

\placeindex

\stopchapter
\stoptext

produces, with MkIV:

and with LMTX:

The example code shows one other instance as well, in the fourth indexed entry.

Beside looking uglier, this results in a couple more pages for the same number of index entries.

As I noted in my first description of the problem, this may not be unique to register processing, and perhaps it is an issue with limitatetext or doboundtext, or something else entirely.

--
Rik