rust/tests/coverage/color.coverage

   LL|       |// edition: 2021
   LL|       |// ignore-mode-coverage-map
   LL|       |// ignore-windows
   LL|       |// llvm-cov-flags: --use-color
   LL|       |
   LL|       |// Verify that telling `llvm-cov` to use colored output actually works.
   LL|       |// Ignored on Windows because we can't tell the tool to use ANSI escapes.
   LL|       |
   LL|      1|fn main() {
   LL|      1|    for _i in 0..0 {}
                      ^0         ^0
   LL|      1|}