src/jdk.compiler/share/classes/com/sun/tools/javac/code/Attribute.java

*** 245,255 ****
              int len = values.length();
              if (len > 0) {
                  buf.append('(');
                  boolean first = true;
                  for (Pair<MethodSymbol, Attribute> value : values) {
!                     if (!first) buf.append(", ");
                      first = false;
  
                      Name name = value.fst.name;
                      if (len > 1 || name != name.table.names.value) {
                          buf.append(name);
--- 245,256 ----
              int len = values.length();
              if (len > 0) {
                  buf.append('(');
                  boolean first = true;
                  for (Pair<MethodSymbol, Attribute> value : values) {
!                     if (!first)
!                         buf.append(", ");
                      first = false;
  
                      Name name = value.fst.name;
                      if (len > 1 || name != name.table.names.value) {
                          buf.append(name);