Use stderr/stderr consistently

Summary: Weird to qualify one but not the other, so make them consistent.

Reviewed By: bayarmunkh

Differential Revision: D53200048

fbshipit-source-id: 44c26a649f78caf12e22536a105089472e960d81

td_util/src/tracing.rs

@@ -10,7 +10,7 @@
 //! Utilities for working with the `tracing` crate.
 //! Ensure all supertd projects have a consistent way of logging.
 
-use std::io;
+use std::io::stderr;
 use std::io::stdout;
 use std::io::IsTerminal;
 
@@ -32,7 +32,7 @@ pub fn init_tracing(directives: Vec<Directive>) {
     let layer = tracing_subscriber::fmt::layer()
         .with_line_number(false)
         .with_file(false)
-        .with_writer(io::stderr)
+        .with_writer(stderr)
         .with_ansi(stdout().is_terminal())
         .with_target(false)
         .with_filter(env_filter);