[tex-hyphen] hyphenation with ligatures in input

[Arthur Reutenauer]

>                                     So, fi doesn't match any patterns,
> but is there to satisfy \lefthyphenmin=1, and that's sufficient in this
> case.  Thanks all!

  I'm glad that satisfies you.  Now, do you understand that

  1. It is a coincidence (a pretty common one, but a coincidence nonetheless)
  2. The ligature characters should not be used at all in new documents

  ?
	Arthur