Vim FAQ: How do I configure Vim to wrap lines (or not wrap lines) of text?
Answer: To get Vim to not wrap text, issue the "vim set nowrap" command, like this:
By default vim will wrap long lines in the editor, but this command changes that display, so long lines will now go off-screen to your right.
vim set wrap - how to get back to wrapping mode
Getting back to the vim editor's normal line wrap mode is also simple. Just issue a very similar "vim set wrap" command:
Once again your lines of text will wrap around your display.