Fixes: debbugs:19434 debbugs:19519 * lisp/emacs-lisp/cl-extra.el (cl-subseq): Use seq-subseq and fix multiple evaluation. * lisp/emacs-lisp/seq.el (seq-subseq): Throw bad bounding indices error. * test/automated/seq-tests.el (test-seq-subseq): Add more tests.
Run admin/update-copyright.
* doc/lispref/sequences.texi (Seq Library): Add documentation for seq.el. * test/automated/seq-tests.el: New file.