bpython breaks line with ANSI escape code #670
Description
This can be easily reproduced by typing
print('\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[3
1mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[3
1mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m\033[31mOK\033[0m')
In bpython
In Python
I guess when calculating the length of output, bpython counts all chars, but not all chars are visible, thus leading to this bug.