Make libtest::ERROR_EXIT_CODE const public to not redefine it in rustdoc

Author: GuillaumeGomez

library/test/src/lib.rs

@@ -90,7 +90,7 @@ use test_result::*;
 use time::TestExecTime;
 
 // Process exit code to be used to indicate test failures.
-const ERROR_EXIT_CODE: i32 = 101;
+pub const ERROR_EXIT_CODE: i32 = 101;
 
 const SECONDARY_TEST_INVOKER_VAR: &str = "__RUST_TEST_INVOKE";
 const SECONDARY_TEST_BENCH_BENCHMARKS_VAR: &str = "__RUST_TEST_BENCH_BENCHMARKS";

src/librustdoc/doctest.rs

@@ -359,8 +359,7 @@ pub(crate) fn run_tests(
     if nb_errors != 0 {
         // We ensure temp dir destructor is called.
         std::mem::drop(temp_dir);
-        // libtest::ERROR_EXIT_CODE is not public but it's the same value.
-        std::process::exit(101);
+        std::process::exit(test::ERROR_EXIT_CODE);
     }
 }