https://www.gnu.org/software/bash/manual/html_node/Arrays.html tells "unset name[subscript] destroys the array element at index subscript."
But if there is a file named names, nameu ,nameb, namec, namer, namei, namep or namet in currenct directory, that does not work, unless globbing is disabled (set -o noglob).
So quoting should be stressed in the manual. BASH_VERSION 4.4.20(1)-release
