Highlights of Emacs 24.3 include:
- Generalized variables are now in core Emacs Lisp.
- An update for the Common Lisp emulation library.
- A new major mode for Python.
There are many more changes; for a summary see the etc/NEWS file, which you can view from Emacs with `C-h n’.
Install / Upgrade Emacs 24.3 via PPA:
Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below command to add the PPA:
sudo add-apt-repository ppa:cassou/emacs
Then update package lists on your system:
sudo apt-get update
After that, you can install or upgrade via synaptic package manager, which is available in Ubuntu Software Center. Or just run below command:
sudo apt-get install emacs24