# retoor <retoor@molodetz.nl>
import re

BLANK_LINES = re.compile(r"\n[ \t]*\n(?:[ \t]*\n)+")
TRAILING = re.compile(r"[ \t]+\n")


def reformat_html(text):
    if "<pre" in text or "<textarea" in text:
        return TRAILING.sub("\n", text)
    text = TRAILING.sub("\n", text)
    return BLANK_LINES.sub("\n\n", text)