docs: public static String hwsTofws( String str )
      {
          char[] chars = str.toCharArray();
          for ( int j = 0; j < chars.length; j++ ) {
              if ( chars[j] == '\u0020' ) {
                  chars[j] = '\u3000';
              } else if ( chars[j] < '\177' ) {
                  chars[j] = (char)(chars[j] + 65248);
              }
          }
          
          return new String(chars);
      }