prefer_adjacent_string_concatenation

Use adjacent strings to concatenate string literals.

This rule is available as of Dart 2.0.0.

Rule sets: recommended, flutter

This rule has a quick fix available.

DO use adjacent strings to concatenate string literals.

BAD:

raiseAlarm(
    'ERROR: Parts of the spaceship are on fire. Other ' +
    'parts are overrun by martians. Unclear which are which.');

GOOD:

raiseAlarm(
    'ERROR: Parts of the spaceship are on fire. Other '
    'parts are overrun by martians. Unclear which are which.');

To enable the prefer_adjacent_string_concatenation rule, add prefer_adjacent_string_concatenation under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - prefer_adjacent_string_concatenation