[racket-dev] Tiny tweak to docs

diff --git a/collects/scribblings/reference/sets.scrbl
b/collects/scribblings/reference/sets.scrbl
index d9ea0c6..44cc41d 100644
--- a/collects/scribblings/reference/sets.scrbl
+++ b/collects/scribblings/reference/sets.scrbl
@@ -27,8 +27,8 @@ unpredictable when keys are mutated.
 @defproc[(seteq [v any/c] ...) set?]
 )]{

-Creates a set that uses @racket[equal?], @racket[eq?], or
- at racket[eqv?], respectively, to compare elements.  The given
+Creates a set that uses @racket[equal?], @racket[eqv?], or
+ at racket[eq?], respectively, to compare elements.  The given
 @racket[v]s are added to the set. The elements are added in the order
 that they appear as @racket[v]s, so in the first two cases, an earlier
 element that is @racket[equal?] or @racket[eqv?] but not @racket[eq?]