sh: Fix problem with stray '\r' character that was introduced in previous change

                    /* Add non-blank lines to history. */

                    linenoiseHistoryAdd(rl_start);

                }

                out2str("\r\n");

                out2str("\n");

                /* Client expects a newline at end of input, doesn't expect null */

                rl_start[el_len++] = '\n';

            }