Update src/index.js

Co-authored-by: codiumai-pr-agent-free[bot] <138128286+codiumai-pr-agent-free[bot]@users.noreply.github.com>

Author: cheton

src/index.js

@@ -102,7 +102,10 @@ const parseLine = (() => {
  return (line, options) => {
  options = options || {};
  options.flatten = !!options.flatten;
- options.lineMode = options.lineMode ?? 'original'; // One of: 'original', 'minimal', 'compact'
+ const validLineModes = ['original', 'minimal', 'compact'];
+ if (!validLineModes.includes(options.lineMode)) {
+ options.lineMode = validLineModes[0];
+ }
 
  const result = {
  line: line,