Restore the removal of all backslashes from styles after decoding of unicode escapes

Author: frenzymadness

lxml_html_clean/clean.py

@@ -618,6 +618,7 @@ def _has_sneaky_javascript(self, style):
         """
         style = self._substitute_comments('', style)
         style = self._decode_css_unicode_escapes(style)
+        style = style.replace('\\', '')
         style = _substitute_whitespace('', style)
         style = style.lower()
         if _has_javascript_scheme(style):