Program: 86509
Project: 86509
Buggy source:
public static String Go(String templateOption,String args[]){
  String workingstring="String_Node_Str" + templateOption;
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  workingstring=colorFormat(workingstring);
  if (args.length == 2) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    return (workingstring);
  }
  if (args.length == 3) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    workingstring=workingstring.replace("String_Node_Str",args[2]);
    return (workingstring);
  }
  if (args.length == 4) {
    workingstring=workingstring.replaceAll("String_Node_Str",args[1]);
    workingstring=workingstring.replaceAll("String_Node_Str",args[2]);
    workingstring=workingstring.replaceAll("String_Node_Str",args[3]);
    return (workingstring);
  }
  if (args.length == 5) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    workingstring=workingstring.replace("String_Node_Str",args[2]);
    workingstring=workingstring.replace("String_Node_Str",args[3]);
    workingstring=workingstring.replace("String_Node_Str",args[4]);
    return (workingstring);
  }
  return workingstring;
}

Fixed version (ground truth):
public static String Go(String templateOption,String args[]){
  String workingstring="String_Node_Str" + templateOption;
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  if (templateOption == "String_Node_Str") {
    workingstring=Config.templates.getString("String_Node_Str");
  }
  workingstring=colorFormat(workingstring);
  if (args.length == 2) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    return (workingstring);
  }
  if (args.length == 3) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    workingstring=workingstring.replace("String_Node_Str",args[2]);
    return (workingstring);
  }
  if (args.length == 4) {
    workingstring=workingstring.replaceAll("String_Node_Str",args[1]);
    workingstring=workingstring.replaceAll("String_Node_Str",args[2]);
    workingstring=workingstring.replaceAll("String_Node_Str",args[3]);
    return (workingstring);
  }
  if (args.length == 5) {
    workingstring=workingstring.replace("String_Node_Str",args[1]);
    workingstring=workingstring.replace("String_Node_Str",args[2]);
    workingstring=workingstring.replace("String_Node_Str",args[3]);
    workingstring=workingstring.replace("String_Node_Str",args[4]);
    return (workingstring);
  }
  return workingstring;
}