bug#3125: 23.0.92; doc of load-library

[Drew Adams]

> > The doc string and Elisp manual entry for `load-library' 
> > could be more
> 
> Please check the new docstring (but not the elisp manual yet).

"actually loaded" -> "to be loaded"

"with or without" -> "with and without"

"the `load-suffixes' (as well as `load-file-rep-suffixes')" ->
"the suffixes from variables `load-suffixes' and `load-file-rep-suffixes'"

(Drop "variable", if that's too long.)

Do you really want to state here that there are two interfaces to `load'? If a
third is added later, then this will need to be updated. Why not just say that
`load-library' is an interface to `load'?

Or, better, just skip that altogether. The xref to the manual is sufficient. The
manual describes the relations among the various load functions. The doc string
need say only what `load-library' does/is.