doc typo
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@ -930,8 +930,8 @@ as the preference file. If the directory of the preferences file does
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not already exist, it is created.
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If the update lock is already held (i.e., the lock file exists), then
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@racket[locked] is called with a single argument: the path of the lock
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file. The default @racket[locked] reports an error; an alternative
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@racket[locked-proc] is called with a single argument: the path of the lock
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file. The default @racket[locked-proc] reports an error; an alternative
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thunk might wait a while and try again, or give the user the choice to
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delete the lock file (in case a previous update attempt encountered
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disaster).
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