Replace one entry in a BibEntry object with another
# S3 method for BibEntry
[[(x, i) <- value- a BibEntry object
- a numeric index or a string entry key
- a single entry BibEntry object or an object that can be
coerced to BibEntry using as.BibEntry
an object of class BibEntry
This function will replace the specified entry in x with the entry given
by value. To replace multiple entries see [<-.BibEntry.
Other operators: $.BibEntry,
$<-.BibEntry, +.BibEntry,
[.BibEntry, [<-.BibEntry,
[[.BibEntry, c.BibEntry