Formats a derived type for full documentation output.

def _format_type(lines, element, spacer=""):
    """Formats a derived type for full documentation output."""
    rlines = []
    rlines.append(element.signature)
    _format_summary(rlines, element)

    rlines.append("")
    _format_generic(rlines, element, ["summary"])

    if len(element.executables) > 0:
        rlines.append("\nEMBEDDED PROCEDURES")
        for key, value in list(element.executables.items()):
            rlines.append("  {}".format(value.__str__()))
            target = value.target
            if target is not None:
                _format_executable(rlines, target, "  ")

    if len(element.members) > 0:
        rlines.append("\nEMBEDDED MEMBERS")
        for key, value in list(element.members.items()):
            _format_value_element(rlines, value, "  ")

    lines.extend([spacer + l for l in rlines])