[OS X TeX] ligatures

Dr. Clea F. Rees cfrees at imapmail.org
Sat Jul 17 15:51:04 EDT 2010

If I typeset the following:
---ligature test file---
% !TEX TS-program = pdflatex
% !TEX encoding = UTF-8 Unicode
\title{Brief Article}
\author{The Author}


f{}f ff shelf{}ful f{}f ff\\

---end test file---
then I get (what is to me) unexpected output.

no-lig-ff lig-ff shel-no-lig-ff-ul no-lig-ff lig-ff

no-lig-ff lig-ff shel-lig-ff-ul no-lig-ff lig-ff

Why does TeX ignore the instruction not to use the ff ligature in
'shelful' when a line break occurs afterwards? And why does it
nonetheless accept the instruction if the f-no-lig-f is typeset in


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