`unsetopt local_options nomatch` unsets both named options,
so LOCAL_OPTIONS is off by the time the function returns and the
`nomatch` change escapes into the caller's shell:
one `nvm ls` or `nvm alias` leaves NO_MATCH off for the rest of the session,
after which an unmatched glob is silently passed through as a literal.
`setopt local_options nonomatch`,
already used in `nvm_check_file_permissions`, restores on return.
The `markdirs` line also cancelled the snapshot
taken for `shwordsplit` on the line above it;
that one is latent,
as `nvm_ls` is only ever called inside a command substitution.
Jordan Harband
25b378323c