Function lineCount

src/repl.ts:703–713

* Count the number of lines.

(value: string)

 * Count the number of lines.
 */
function lineCount(value: string) {
  let count = 0;

  for (const char of value) {
    if (char === '\n') {
      count++;
    }
  }

  return count;
}

/**
 * TS diagnostic codes which are recoverable, meaning that the user likely entered an incomplete line of code