Here is the exact word I put on the cover letter
Please note: The receipt date of the XXX's H1b petition is October 16, 2000, which is before the expiration date (November 08, 2000) of her Optional Practical Training (OPT) period. Also, XXX was informed by her attorney of that time (Mr. XXX, International Law Office of XXX, address, Phone: 713-xxx-xxxx) that she should be able to continue working between the OPT expiration date (November 08, 2000) and H1b approval date (December 16, 2000), which is 37 days in total, after the filing of her H1b petition. Should her attorney misinterpreted the immigration law at that time (we did not verify with other lawyers about this issue), the petitioner would like to respectfully remind the officer that Section 245(k) of The Immigration and Nationality Act (INA) enables Ms. xxx to adjust her status, provided that she has never been out of status or work without authorization for more than 180 days.
I was pretty worried about that myself, and was afraid that our cases would be transferred to local office because of my wife's short unauthorized employment gap, but seems that USCIS does not care too much about that if it is < 180 days. Hope it helps.