[tex4ht] [bug #433] Ligature fi becoming ø in avant garde

[Hilmar Preusse]

URL:
  <http://puszcza.gnu.org.ua/bugs/?433>

                 Summary: Ligature fi becoming ø in avant garde
                 Project: tex4ht
            Submitted by: hpreusse
            Submitted on: So 28 Jul 2019 22:02:04 EEST
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Minor
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The following input:

\documentclass{article}
\usepackage{avant}
\usepackage[T1]{fontenc}
\begin{document}
first
\textsf{first}
\end{document}

with the following command:

  mk4ht htlatex a.tex "html,uni-html4,css2,charset=utf-8,info" " -cunihtf
-utf8"

gets the following HTML output:

  first
  ørst 

Notice how the fi (fi; U+FB01) ligature becomes ø (small o stroke; U+00F8).

Further please note that when selecting another font the problem disappears.
The original reporter listed the font families below.

These fonts work:
	- computer modern (default)
	- lmodern
	- charter
	- palatino
	- times (both serif and sans-serif)
	- utopia

These do not:
	- avant
	- bookman (both serif and sans-serif broken)
	- chancery
	- newcent (both serif and sans-serif)




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