Is there a guideline on reviewing patches?

[LOH KOK HOE]

Hi,

I am currently doing code review through the website at
https://gerrit.libreoffice.org without being download the source code to
compile, and then test run. I would like to know how could I download the
patches in order for me to test at least one round on my local PC so that I
could ensure the code is something what we want it to fix. But if something
weird happen, how could I revert the patches code?

THanks @!
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