bibtex-fill-entry
bibtex-fill-entry is an interactive compiled Lisp function in `bibtex.el
'.
(bibtex-fill-entry)
Fill current BibTeX entry.
Realign entry, so that every field starts on a separate line. Field
names appear in column `bibtex-field-indentation', field text starts in
column `bibtex-text-indentation' and continuation lines start here, too.
If `bibtex-align-at-equal-sign' is non-nil, align equal signs, too.