Twin directories of zsh-3.1.6:

[DIR]3  zsh-3.1.6-doc.tar.gz/usr/doc/zsh-3.1.6/
[DIR]3  zsh-3.1.6.tar.gz/zsh-3.1.6/

[DIR]3  zsh-3.1.6.tar.gz/zsh-3.1.6/
[DIR]3  zsh-3.1.7-doc.tar.gz/zsh-3.1.6/