Well if you really want to go into painful detail about it, I had originally phrased the sentence differently, something along the lines of "leaving out the var in the for loop initialisation". It wasn't very readable so I changed it, but the word 'initialise' was on my mind.
In any case, I'm not sure that I need a hint to tell me that doing things quickly and carelessly is a bad idea. But we all do it sometimes, in both our programming and our writing.