Maximum width of text that is being inserted. A longer line will be broken after white space to get this width. A zero value disables this. 'textwidth' is set to 0 when the 'paste' option is set and restored when 'paste' is reset. When 'textwidth' is zero, 'wrapmargin' may be used. See also 'formatoptions' and ins-textwidth. When 'formatexpr' is set it will be used to break the line. NOTE: This option is set to 0 when 'compatible' is set.

(default 0)