Function dedent

Lib/test/test_email/test_inversion.py:16–23

(bstr)

# This is like textwrap.dedent for bytes, except that it uses \r\n for the line
# separators on the rebuilt string.
def dedent(bstr):
    lines = bstr.splitlines()
    if not lines[0].strip():
        raise ValueError("First line must contain text")
    stripamt = len(lines[0]) - len(lines[0].lstrip())
    return b'\r\n'.join(
        [x[stripamt:] if len(x)>=stripamt else b''
            for x in lines])


@parameterize