1 files changed, 3 insertions, 3 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/logging/progress/StepProgress.java b/src/de/lmu/ifi/dbs/elki/logging/progress/StepProgress.java
index df6e3b13..1a0d3101 100644
--- a/src/de/lmu/ifi/dbs/elki/logging/progress/StepProgress.java
+++ b/src/de/lmu/ifi/dbs/elki/logging/progress/StepProgress.java
@@ -62,15 +62,15 @@ public class StepProgress extends FiniteProgress {
   // No constructor with auto logging - call beginStep() first
 
   @Override
-  public StringBuffer appendToBuffer(StringBuffer buf) {
+  public StringBuilder appendToBuffer(StringBuilder buf) {
     buf.append(super.getTask());
     if (isComplete()) {
       buf.append(": complete.");
     } else {
-      buf.append(" #").append(getProcessed()+1).append("/").append(getTotal());
+      buf.append(" #").append(getProcessed()+1).append('/').append(getTotal());
       buf.append(": ").append(getStepTitle());
     }
-    buf.append("\n");
+    buf.append('\n');
     return buf;
   }