/// support it can also keep track of the RSS of the program at various points.
/// By default, the Timer will print the amount of time it has captured to
/// standard error when the laster timer is destroyed, otherwise it is printed
-/// when it's TimerGroup is destroyed. Timer's do not print their information
+/// when its TimerGroup is destroyed. Timers do not print their information
/// if they are never started.
///
class Timer {