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doc tweaks

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This commit is contained in:
Matthew Flatt 2014-04-04 10:06:35 -06:00
parent fbb419a9fa
commit 1f7f0af1f3
1 changed files with 3 additions and 1 deletions
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pkgs/racket-pkgs/racket-doc/scribblings/reference/data.scrbl
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@ -184,6 +184,8 @@ not normally produce an @racket[undefined] value.
The @racket[undefined] value is always @racket[eq?] to itself.
@history[#:added "6.0.0.6"]
@defproc[(undefined? [v any/c]) boolean?]{Returns @racket[#t] if @racket[v] is the
constant @racket[undefined], @racket[#f] otherwise.}
@ -195,6 +197,6 @@ The @racket[undefined] value is always @racket[eq?] to itself.
Checks whether @racket[v] is @racket[undefined], and raises
@racket[exn:fail:contract:variable] in that case with an error message
along the lines of ``@racket[sym]: variable used before its definition.''
If @racket[v] is not @racket[undefined], then it is returned.
If @racket[v] is not @racket[undefined], then @racket[v] is returned.
}