I stand by what I wrote
(This is not the first time I'm exploring chess myths around here, it's gonna become a habitual sight!)
Alekhine, in front of whose brilliance I humbly bow, was no more than human. Proof : The superb Alexander Alekhine's Best Games, 1902-1946, where the authors, Leonard M. Skinner & Robert G. P. Verhoeven, quote the master himself analysing his games. On p.235, after 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 c6 5.e3, Alekhine plays 5...Qa5 and writes that he's unaware of the move having being played before, in master praxis. Yet the move had occured, via transposition, in Pillsbury v Janowsky, Budapest, 1896, and Reggio v Pillsbury, Monte Carlo, 1903. In the same book, on p.509, we read that after 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.0-0 Nf6, the move 6.c3 is introduced by Alekhine, while it had actually been played already in Walbrodt v Steinitz, Hastings, 1895.
Alekhine was capable of being at times merciless with his own faults at play but he has also "improved" some game-scores for immortality. He wrote a tournament book (of New York, 1927) which was shamefully biased against Capablanca.
--Source inter alia : the brilliant Kings, Commoners and Knaves by that ruthless chess paladin, Edward Winter. Highly recommended.