Matching bug

[nus-pe-bot]

Selected patient with nric T3261297D.
Afterwards, I tried to match with donor of nric F5109492U.

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_{[original: hooncp/ped#10]}

[iskandarzulkarnaien]

@C-likethis123 may wish to look into this

[C-likethis123]

I believe that this is a combination of two issues:
(1) Feature flaw inherited from AB3 where more than 1 value of the same prefix is accepted. Refer to this for a detailed writeup of the bug: #194

(2) Documentation flaw, as it is unclear to the user how the match function works.

Documentation will be improved and a fix for issue (1) will be in an upcoming PR.