annotate type in doc example
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@ -269,7 +269,7 @@ mapMaybeStep p = go where
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-- | Run action for each value in the 'SourceT'.
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-- | Run action for each value in the 'SourceT'.
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--
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--
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-- >>> foreach fail print (source "abc")
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-- >>> foreach fail print $ source ("abc" :: String)
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-- 'a'
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-- 'a'
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-- 'b'
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-- 'b'
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-- 'c'
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-- 'c'
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