Mel Brooks film kicks off not with its opening sequence, but rather an introduction by University of Chicago professor and TCM host Jacqueline Stewart.The intro, in which the “Silent Sunday Nights” host provides social context to the 1974 Cleavon Little-Gene Wilder comedy, is similar to the disclaimer in front of “Gone with the Wind.”“This movie is an overt and audacious spoof on classic Westerns,” Stewart says in the newly added intro.