Function _keep_original_ws

Lib/difflib.py:718–723

Replace whitespace with the original whitespace characters in `s`

(s, tag_s)

def _keep_original_ws(s, tag_s):
    """Replace whitespace with the original whitespace characters in `s`"""
    return ''.join(
        c if tag_c == " " and c.isspace() else tag_c
        for c, tag_c in zip(s, tag_s)
    )