code: private String normalizePath(String scriptPath) {
          StringBuilder builder = new StringBuilder(scriptPath.length() + 1);
          if (scriptPath.startsWith("/")) {
              builder.append(scriptPath.substring(1));
          } else {
              builder.append(scriptPath);
          }
          if (!scriptPath.endsWith("/")) {
              builder.append("/");
          }
          return builder.toString();
      }
docs: Ensures that every path starts and ends with a slash character.
  
  @param scriptPath the scriptPath that needs to be normalized
  @return a path with leading and trailing slash