Add line numbers to PHD logging output (#180)

Author: gjcolombo

phd-tests/runner/src/main.rs

@@ -14,7 +14,7 @@ fn main() {
     // Set up a tracing subscriber.
     let filter = EnvFilter::builder()
         .with_default_directive(tracing::Level::INFO.into());
-    let stdout_log = tracing_subscriber::fmt::layer();
+    let stdout_log = tracing_subscriber::fmt::layer().with_line_number(true);
     let subscriber =
         Registry::default().with(filter.from_env_lossy()).with(stdout_log);
     tracing::subscriber::set_global_default(subscriber).unwrap();