message: Improve readability of caseSingleStatement tests
diff: import {test} from 'rome';
  import {testLintMultiple} from '../testHelpers';
  +import {dedent} from '@romejs/string-utils';
  test(
  'case single statement',
  async (t) => {
  + // VALID
  await testLintMultiple(
  t,
  [
  - // VALID
  - "switch (foo) {case true: case false: return 'yes';}",
  // Single statement
  - 'switch (foo) {case true: {}}',
  + dedent`
  + switch (foo) {
  + case true:
  + case false:
  + return 'yes';
  + }
  + `,
  // Single block
  - 'switch (foo) {case true:}',
  + dedent`
  + switch (foo) {
  + case true: {
  + // empty
  + }
  + }
  + `,
  // Nothing
  + dedent`
  + switch (foo) {
  + case true:
  + }
  + `,
  + ],
  + {category: 'lint/caseSingleStatement'},
  + );
  +
  // INVALID
  - "switch (foo) {case true: case false: let foo = ''; foo;}", // Multiple statements
  + await testLintMultiple(
  + t,
  + [
  + // Multiple statements
  + dedent`
  + switch (foo) {
  + case true:
  + case false:
  + let foo = '';
  + foo;
  + }
  + `,
  ],
  {category: 'lint/caseSingleStatement'},
  );
  