expand abbreviations in 'journal' entries

[yegor256]

For example, this one:

@article{pierce94,
  author = {Benjamin C. Pierce and David N. Turner},
  title = {Simple Type-Theoretic Foundations for Object-Oriented Programming},
  journal = {J. Funct. Program.}
}

To replace with:

@article{pierce94,
  author = {Benjamin C. Pierce and David N. Turner},
  title = {Simple Type-Theoretic Foundations for Object-Oriented Programming},
  journal = {Journal of Functional Programming}
}

Maybe at least complain about this case, if we can't auto-fix.