Cleanup imports

src/libsyntax/test_snippet.rs

@@ -1,7 +1,8 @@
 use crate::source_map::{SourceMap, FilePathMapping};
+use crate::with_globals;
+
 use errors::Handler;
 use errors::emitter::EmitterWriter;
-use crate::with_globals;
 
 use std::io;
 use std::io::prelude::*;