Sean Whitton <spwhitton@spwhitton.name> writes:

> Are you suggesting: s/map-length/length/ ?

There's also a usage of `map-put' to replace, as well as the `require'
in the beginning of the file.

However, seq.el was introduced in Emacs 25.1, so in the Emacs repository
there is no need to change anything there.  I suppose you're talking
about the version of seq.el in ELPA?

Cheers,
Nico