On 2/3/2026 6:16 PM, Jim wrote:

So, for whatever reason, in one case, \testpage doesn't eject a page with
   HERE after blank 138pt > 597.51323pt, 600.36824pt, 157.9473pt, 129.0pt
but with a line deleted, \testpage does eject the page with
   HERE after blank 138pt > 597.51323pt, 585.89459pt, 157.9473pt, 129.0pt


Q1: why does \testpage break in the second case but not the first?

tex has stretch and shrink to play with ... so not bad enough to break

I am surprised at the amount of stretch and shrink.  I traced the code for
a while until I got to
         \clf_injectvspacing
but I could not find the definition of that command.

seach for it without the clf_ .. it's in the lua code

Q2: where is all the stretch and shrink coming from?

from the blank (you can use "big,fixed" or "line" or ...)

P.S. Back to reading musings-basic...

Ok, so you can then also fix typos.

Hans


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