no_adjacent_strings_in_list    
              
Don't use adjacent strings in list.
Details
#DON'T use adjacent strings in a list.
This can indicate a forgotten comma.
BAD:
dart
List<String> list = <String>[
  'a'
  'b',
  'c',
];GOOD:
dart
List<String> list = <String>[
  'a' +
  'b',
  'c',
];
Enable
#To enable the no_adjacent_strings_in_list rule,
add no_adjacent_strings_in_list under linter > rules in your
analysis_options.yaml file:
analysis_options.yaml
yaml
linter:
  rules:
    - no_adjacent_strings_in_listIf you're instead using the YAML map syntax to configure linter rules,
add no_adjacent_strings_in_list: true under linter > rules:
analysis_options.yaml
yaml
linter:
  rules:
    no_adjacent_strings_in_list: true