auto merge of #19258 : nick29581/rust/dxr-minor, r=brson

r?

src/librustc_trans/save/recorder.rs

@@ -171,7 +171,7 @@ impl<'a> FmtStrs<'a> {
 
         let pairs = fields.iter().zip(values);
         let mut strs = pairs.map(|(f, v)| format!(",{},\"{}\"", f, escape(
-            if *f == "qualname" {
+            if *f == "qualname" && v.len() > 0 {
                 let mut n = self.krate.clone();
                 n.push_str("::");
                 n.push_str(v);

src/librustc_trans/save/span_utils.rs

@@ -293,7 +293,6 @@ impl<'a> SpanUtils<'a> {
                 if ts.tok == token::Eof {
                     return None
                 } else {
-                    println!("found keyword: {} at {}", ts, ts.sp);
                     return self.make_sub_span(span, Some(ts.sp));
                 }
             }