run codespell throughout fixing typos automagically

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

Utility/QuickCheck.hs

@@ -32,7 +32,7 @@ import Prelude
  - characters, except for ones in surrogate plane. Converting a string that
  - does contain other unicode characters to a ByteString using the
  - filesystem encoding (see GHC.IO.Encoding) will throw an exception,
- - so use this instead to avoid quickcheck tests breaking unncessarily.
+ - so use this instead to avoid quickcheck tests breaking unnecessarily.
  -} 
 newtype TestableString = TestableString
 	{ fromTestableString :: String }
@@ -46,7 +46,7 @@ instance Arbitrary TestableString where
  -
  - No real-world filename can be empty or contain a NUL. So code can
  - well be written that assumes that and using this avoids quickcheck
- - tests breaking unncessarily.
+ - tests breaking unnecessarily.
  -} 
 newtype TestableFilePath = TestableFilePath
 	{ fromTestableFilePath :: FilePath }