Hide Python errors context panel.
Default to 79 line length.

I'm free to ignore line length warning in vim.
Code layout.
Add Emoji support to Ubuntu.
Use fatter tick and cross.
Hard code user and prompt color.

The .bash_profile defining them is local to the current user, root never
use it. And for this case, we already have a SUDO_PS1 defined.
Drop default prompt sign.