prefer_adjacent_string_concatenation

Use adjacent strings to concatenate string literals.

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

If you're instead using the YAML map syntax to configure linter rules, add prefer_adjacent_string_concatenation: true under linter > rules:

linter:
  rules:
    prefer_adjacent_string_concatenation: true