If you have not seen a case citation with a parenthetical (”cleaned up”) yet, you will eventually. Writers use it when altering—ever so slightly—quotes from legal authorities. Legal writing pro Ross Guberman explains why some attorneys love it, and others hate it.
Ross also addressed my view: that I trust judges to “clean up” quotations, but I don’t know if judges and law clerks would trust us attorneys’ trying our hand at it. Ross is not enthusiastic about double standards in legal writing: if judges adopt a practice, it is too much to expect lawyers not to follow suit.