message: Implement if token
diff: @@ -534,6 +534,18 @@ export const plugin: Plugin = {
  }
  break;
  case 'if':
  + if (previousToken) {
  + switch (previousToken.type) {
  + case 'newline':
  + case 'outdent':
  + result += indent.repeat(indentLevel);
  + break;
  + case 'indent':
  + result += indent;
  + break;
  + }
  + }
  + result += `if ${token.val}`;
  break;
  case 'mixin-block':
  break;
  