"I had Jeff Burton behind Matt Kenseth, and Kenseth just pushed the heck out of me," said Harvick, who was deep in the pack with 10 laps to go.
The only difference between what was actually said and what Foxsports.com quoted him as saying was the replacement of "hell" with "heck." See here, here and here. I know in other interviews Harvick said 'heck' but never in the same wording as above.
But, seriously, why would they just change the word? It's not even really a swear word and on top of that there is no indication from the author that the quote has been changed. I don't know much about journalistic ethics but this doesn't strike me as within the bounds.