Search feature doesn't work according to UG - works on OR principle instead of AND principle

[nus-se-bot]

Steps to reproduce
search -g T02B R03C

Expected result
List of students who are in both T02B and R03C.

Actual result
List of students who are in T02B or R03C.

Screenshots

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_{[original: nus-cs2103-AY2122S1/pe-interim#5773] [original labels: type.FunctionalityBug severity.High]}

[zhing22]

Team's Response

expected result, as explained in the following example in UG:

command : search -g T02B R03C

expected result: "returns a list of students in the groups T02B and R03C. "

instead of "return a list of students in both group T02B and R03C. "

more of a phrasing issue instead of a functionality bug.

Duplicate status (if any):

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