docs: static String readFile(String file) {
  
          try {
              FileReader     reader = new FileReader(file);
              BufferedReader read   = new BufferedReader(reader);
              StringBuffer   b      = new StringBuffer();
              String         s      = null;
              int            count  = 0;
  
              while ((s = read.readLine()) != null) {
                  count++;
  
                  b.append(s);
                  b.append('\n');
              }
  
              read.close();
              reader.close();
  
              return b.toString();
          } catch (IOException e) {
              return e.getMessage();
          }
      }