This patch was written by Jim Meyering and myself.
* src/copy.c (copy_reg): Turn EISDIR to ENOTDIR to improve the
quality of diagnostics for commands like "cp a nosuch/". Reported
by Марк Коренберг and Alan Curry in the thread starting at:
http://lists.gnu.org/archive/html/bug-coreutils/2010-11/msg00178.html
* THANKS: Update.
* tests/mv/trailing-slash: Add a test.