fix doc typo (#3047)

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Xu Chunyang 2020-02-17 23:49:43 +08:00 committed by GitHub
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commit 5555019ec2
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@ -1735,7 +1735,7 @@ a-union-val
]}
@defproc[(union-ptr [u array?]) cpointer?]{
@defproc[(union-ptr [u union?]) cpointer?]{
Extracts the pointer for a union's storage.