Formats a time tick with just enough decimals for its step, never as -0.
-0
Tick value, seconds.
Tick step from timeAxisTicks, seconds.
Label unit from timeAxisTicks.
The number without unit, e.g. -500 (ms) or 1.5 (s).
-500
1.5
Formats a time tick with just enough decimals for its step, never as
-0.