fixed the 'line' drawing so that it adds a rounded cap, like in CPython's version
fixed the 'line' drawing so that it adds a rounded cap, like in CPython's version

Hasimir/brython,kikocorreoso/brython,Hasimir/brython,jonathanverner/brython,kikocorreoso/brython,Hasimir/brython,Hasimir/brython,brython-dev/brython,jonathanverner/brython,kikocorreoso/brython,brython-dev/brython,jonathanverner/brython,jonathanverner/brython,brython-dev/brython