@debug the command being run when Pkg.test runs the tests in a subprocess (#3671)

Author: DilumAluthge

src/Operations.jl

@@ -2033,6 +2033,7 @@ end
 
 # Handles the interrupting of a subprocess gracefully to avoid orphaning
 function subprocess_handler(cmd::Cmd, ctx, sandbox_ctx, error_msg::String)
+    @debug "Running command" cmd
     p = run(pipeline(ignorestatus(cmd), stdout = sandbox_ctx.io, stderr = stderr_f()), wait = false)
     interrupted = false
     try