Transition between default and scientific number formatting is not smooth

[jokasimr]

sc.array(dims=['spectrum'], values=[0.011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  0.011
sc.array(dims=['spectrum'], values=[0.0011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  0.001
sc.array(dims=['spectrum'], values=[0.00011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  0.000     <-----  Looks like it is zero!
sc.array(dims=['spectrum'], values=[0.000011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  1.100e-05

Perhaps a good rule of thumb would be to always show at least 2 significant digits.
Then the above would instead look like:

sc.array(dims=['spectrum'], values=[0.011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  0.011
sc.array(dims=['spectrum'], values=[0.0011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  1.100e-03
sc.array(dims=['spectrum'], values=[0.00011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  1.100e-04
sc.array(dims=['spectrum'], values=[0.000011])
# Out: scipp.Variable (264 Bytes (spectrum: 1)  float64  𝟙  1.100e-05