[tex-hyphen] hyphenation with ligatures in input

[bnb at ams.org]

(not addressing anything but what might
be permissible hyphenations.)

On Wed, 15 Jan 2014, Mojca Miklavec wrote:

    [...]  On
    top of that, imagine that there exists a word in a language where
    hyphenation between "f" and "i" is allowed. If a dummy user provides
    text with ligatures, there is no way to hyphenate that word properly.

u.s. english does ...

  *\showhyphens{definite definition}

  Underfull \hbox (badness 10000) detected at line 0
  [] \tenrm def-i-nite def-i-ni-tion

just not everywhere.