Full outline.

docs/Tuple.md

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+Tuples
+======
+
+```haskell
+fst :: (a, b) -> a
+```
+
+```haskell
+snd :: (a, b) -> b
+```
+
+```haskell
+swap :: (a, b) -> (b, a)
+```
+
+```haskell
+curry :: ((a, b) -> c) -> a -> b -> c
+```
+
+```haskell
+uncurry :: (a -> b -> c) -> (a, b) -> c
+```