use String::new() instead of String::from(""), "".to_string(), "".to_owned() or "".into()

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsyntax/ext/source_util.rs b/src/libsyntax/ext/source_util.rs
index 19a204cc989..e4b9e3216b1 100644
--- a/src/libsyntax/ext/source_util.rs
+++ b/src/libsyntax/ext/source_util.rs
@@ -184,7 +184,7 @@ pub fn expand_include_bytes(cx: &mut ExtCtxt, sp: Span, tts: &[tokenstream::Toke
         Ok(..) => {
             // Add this input file to the code map to make it available as
             // dependency information, but don't enter it's contents
-            cx.source_map().new_source_file(file.into(), "".to_string());
+            cx.source_map().new_source_file(file.into(), String::new());
 
             base::MacEager::expr(cx.expr_lit(sp, ast::LitKind::ByteStr(Lrc::new(bytes))))
         }