Lets the track-substitution hook be enabled/disabled by flipping one constexpr bool in main.cpp instead of commenting/uncommenting code, so before/after comparisons don't need back-and-forth edits.
Lets the track-substitution hook be enabled/disabled by flipping one constexpr bool in main.cpp instead of commenting/uncommenting code, so before/after comparisons don't need back-and-forth edits.