Miss-match number of tags that can be added for add command in UG and actual app

[awc1116]

input:
add n/ shamugan p/12345678 e/ shamugan123@hotmail.com a/blk 123 Tampines St 20 t/authistic t/mild-nutrition

expected:

error as in the UG it stated that only can ass one tag as there is no ... behind [t/tag]

actual:

the patient is added with 2 tags

[nus-se-bot]

Your response not required for this bug as the team has accepted the bug as it is.