issue2550535 Fix keep_quoted_text=yes setting. In some cases even when keep_quoted_text=yes is configured we would strip quoted sections. This hit the python bug-tracker especially for python interpreter examples with leading '>>>' strings. The fix is slightly different compared to the proposal as this broke keep_quoted_text=no in certain cases. We also fix a bug where keep_quoted_text=no would drop the last line of a non-quoted section if there wasn't an empty line between the next quotes.

def audit_html_files(db, cl, nodeid, newvalues):
    if newvalues.has_key('type') and newvalues['type'] == 'text/html':
        newvalues['type'] = 'text/plain'
    

def init(db):
    db.file.audit('set', audit_html_files)
    db.file.audit('create', audit_html_files)