class AlmostSpacelessNode(Node):
    def __init__(self, nodelist):
        self.nodelist = nodelist

    def render(self, context):
        return self.remove_whitespace(self.nodelist.render(context).strip())

    def remove_whitespace(self, value):
        value = re.sub(r'\n', ' ', value)
        value = re.sub(r'\s+', ' ', value)
        return value 


@register.tag(name='almostspaceless')
def spaceless(parser, token):
    """   
    Remove all whitespace except for one space from content
    """
    nodelist = parser.parse(('endalmostspaceless',))
    parser.delete_first_token()
    return AlmostSpacelessNode(nodelist)