It may take long for find command to spot the temporary file created on
the home directory

- bd! leaves the window open when there's no other listed buffer
- redraw! seems to help avoid Neovim issues.

Close #146

Temporary workaround for https://github.com/Homebrew/homebrew/issues/39669

Close #233

setopt extendedglob on zsh caused caret in grep pattern to be expanded.
Problem identified and patch submitted by @lazywei.

[zsh] `head -n1` instead of `head -1`

at least my version of head wants -n1 to only display the first line

No error on ~INVALID_USERNAME**<TAB>