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 disable
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE