added line length of 120 for flake8

vim/.vim/after/ftplugin/python.vim

@@ -8,6 +8,8 @@ setlocal colorcolumn=120
 setlocal path=.,**
 setlocal wildignore+=*.pyc
 
+let g:ale_python_flake8_options = '--max-line-length=120'
+
 " Add search in other files inside the path
 set include=^\\s*\\(from\\\|import\\)\\s*\\zs\\(\\S\\+\\s\\{-}\\)*\\ze\\($\\\|\ as\\)
 " function! PyInclude(fname)