Fix rebase fallout

compiler/rustc_mir/src/util/graphviz.rs

@@ -114,21 +114,16 @@ where
     let (blk, bgcolor) = if data.is_cleanup {
         (format!("{} (cleanup)", block.index()), "lightblue")
     } else {
-        let color = if dark_mode {
-            "dimgray"
-        } else {
-            "gray"
-        };
-        (format!("{}", block.index()), "gray")
+        let color = if dark_mode { "dimgray" } else { "gray" };
+        (format!("{}", block.index()), color)
     };
     write!(
         w,
         r#"<tr><td bgcolor="{bgcolor}" {attrs} colspan="{colspan}">{blk}</td></tr>"#,
-        bgcolor = if dark_mode { "dimgray" } else { "gray" },
         attrs = r#"align="center""#,
         colspan = num_cols,
         blk = blk,
-        color = color
+        bgcolor = bgcolor
     )?;
 
     init(w)?;