How does the "French Defense, Winawer Variation, Fingerslip Variation" get its name? Why is this particular iteration of the "French Defense, Winawer Variation" called the "Fingerslip Variation"? 

[fen "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2
According to "The Batsford Guide to Chess Openings" by Leonard Barden and Tim Harding:

"This move had its introduction into master play as the result of a fingerslip by Alekhine against Flohr, at Nottingham in 1936. He had intended 4 P-K5 P-QB4 5 B-Q2, but played the moves in the wrong order"

The game is at

http://www.chessgames.com/perl/chessgame?gid=1008345