# "exec" commands are ran with the user shell by default, but this may
# be non-POSIX. For example, if SHELL=zsh then ">file" doesn't work
-# to create a file. Unseting SHELL avoids such non-portable behavior
+# to create a file. Unsetting SHELL avoids such non-portable behavior
# in tests. It must be exported for it to take effect where needed.
SHELL=
export SHELL