This commit updates the benchmark timings and repeat counts for various
example files. The `tester.rs` script has been modified to:
- Correctly parse and use the `Benchmark-Repeat` directive.
- Implement an adaptive sampling mechanism for more accurate median
calculation, especially for long-running benchmarks.
- Improve the logic for updating and inserting benchmark and repeat
lines in example files.
- Handle potential compilation and runtime errors during benchmark
execution.
Michael Schimmel