fix ack command on debian
Merge pull request #121 from victorklos/fix_debian_search_issue_120

fix ack command on debian
fix typo in debian search fix
Merge pull request #122 from victorklos/fix_debian_search_typo

fix typo in debian search fix
update rbenv.zsh according to manpage
Merge pull request #123 from victorklos/rbenv_inclusion_per_docs

update rbenv.zsh according to manpage
personalize