How to stop line breaking in vim

Question

I like that the long lines are displayed over more than one terminal line; I don’t like that vim inserts newlines into my actual text. Which part of .vimrc I should change?

Answer 1

I like that the long lines are displayed over more than one terminal line

This sort of visual/virtual line wrapping is enabled with the wrap window option:

set wrap

I don’t like that vim inserts newlines into my actual text.

To turn off physical line wrapping, clear both the textwidth and wrapmargin buffer options:

set textwidth=0 wrapmargin=0