[tex-k] Typos on pages Exiii, E582, E584

[胡亚捷 (Hu Yajie)]

Page Exiii, lines ???:

    The entries `The Euler Project ...' and `Designing new typefaces ...'
    contain three METAFONT logos. Two of them should be slanted because they
    occur in italic text.

    [I'm looking at an old copy of Volume E, though, so I'm not sure if this
     has been fixed. But it's not mentioned in the errata files.]

Page E582, index entries for '015 and '040
Page E584, index entry for '015:

    Change `456' to `457', because this index is supposed to point to
    programs instead of illustrations.