missing_whitespace_between_adjacent_strings

Missing whitespace between adjacent strings.

The analyzer produces this diagnostic for a pair of adjacent string literals unless either the left-hand string ends in whitespace or the right-hand string begins with whitespace.

The following code produces this diagnostic because neither the left nor the right string literal includes a space to separate the words that will be joined:

var s =
  'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed'
  'do eiusmod tempor incididunt ut labore et dolore magna';

Add whitespace at the end of the left-hand literal or at the beginning of the right-hand literal:

var s =
  'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed '
  'do eiusmod tempor incididunt ut labore et dolore magna';

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.