elpa-ws-butler software package provides unobtrusively remove trailing whitespace in Emacs, you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install elpa-ws-butler
elpa-ws-butler is installed in your system.
Make ensure the elpa-ws-butler package were installed using the commands given below,
$ sudo dpkg-query -l | grep elpa-ws-butler *
You will get with elpa-ws-butler package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Lisp |
| Package | elpa-ws-butler |
| Version | 0.3+git.a998a23-1 |
| Description | unobtrusively remove trailing whitespace in Emacs |
| Sub Section | lisp |