Description of problem:
In some condition, bash dont display a new line while editing long commands

How reproducible:
Each time

Steps to Reproduce:
1. open a virtual terminal not maximized
2. start something like vi
3. maximize the virtual tty with alt + F10
4. quit vi
5. try write a very long command

Actual results:
bash display something like :

"end of commandend of prompt $ begin of the very long command"
Expected results:
"begin of prompt end of prompt $ begin of the very long command
end of command"

Fix:
The problem is fixed with setting the checkwinsize option. With should be done by default.
with 
shopt -s checkwinsize

the problem is better described here:
https://blogs.oracle.com/dp/entry/why_bash_doesn_t_work