in src/StringDiff.php [86:91]
public function getUnifiedDiff(int $context = 3): string {
$hunks = $this->getHunks($context);
return Vec\map($hunks, $hunk ==> $this->getUnifiedDiffHunk($hunk))
|> Vec\filter_nulls($$)
|> Str\join($$, '');
}