Fix clippy::writeln_empty_string

Author: tesuji

src/cli/common.rs

@@ -193,7 +193,7 @@ fn show_channel_updates(
         let _ = t.reset();
         let _ = writeln!(t, " - {}", version);
     }
-    let _ = writeln!(t, "");
+    let _ = writeln!(t);
 
     Ok(())
 }

src/cli/download_tracker.rs

@@ -105,7 +105,7 @@ impl DownloadTracker {
         if self.displayed_progress {
             // Display the finished state
             self.display();
-            let _ = writeln!(self.term.as_mut().unwrap(), "");
+            let _ = writeln!(self.term.as_mut().unwrap());
         }
         self.prepare_for_new_download();
     }

src/cli/term2.rs

@@ -67,7 +67,7 @@ struct LineWrapper<'a, T: io::Write> {
 impl<'a, T: io::Write + 'a> LineWrapper<'a, T> {
     // Just write a newline
     fn write_line(&mut self) {
-        let _ = writeln!(self.w, "");
+        let _ = writeln!(self.w);
         // Reset column position to start of line
         self.pos = 0;
     }