Problem with sparklines library causes example programs to crash

[RetiredWizard]

When attempting to run the sparkline example programs the following error is displayed:

spi.frequency: 26666666
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "spark3.py", line 198, in <module>
  File "adafruit_display_shapes/sparkline.py", line 96, in add_value
  File "adafruit_display_shapes/multisparkline.py", line 201, in add_values
  File "adafruit_display_shapes/multisparkline.py", line 236, in update_line
TypeError: list indices must be integers, not list

It turns out that the update_line method of the MultiSparkline class does not accept a list of line indexes, it either updates a single line or, when "None" is passed instead of the line index, all lines.