properly markup <$> in documentation of alterF

For both `IntMap` variants, the `<` and `>` did not appear in the
haddock output.

While at it, also in the documentation for the other `alterF` variants
the `<$>` was turned into a hyperlink.

containers/src/Data/IntMap/Internal.hs

@@ -1005,7 +1005,7 @@ alter f k Nil     = case f Nothing of
 
 -- | \(O(\log n)\). The expression (@'alterF' f k map@) alters the value @x@ at
 -- @k@, or absence thereof.  'alterF' can be used to inspect, insert, delete,
--- or update a value in an 'IntMap'.  In short : @'lookup' k <$> 'alterF' f k m = f
+-- or update a value in an 'IntMap'.  In short : @'lookup' k '<$>' 'alterF' f k m = f
 -- ('lookup' k m)@.
 --
 -- Example:

containers/src/Data/IntMap/Strict/Internal.hs

@@ -600,7 +600,7 @@ alter f !k t =
 
 -- | \(O(\log n)\). The expression (@'alterF' f k map@) alters the value @x@ at
 -- @k@, or absence thereof.  'alterF' can be used to inspect, insert, delete,
--- or update a value in an 'IntMap'.  In short : @'lookup' k <$> 'alterF' f k m = f
+-- or update a value in an 'IntMap'.  In short : @'lookup' k '<$>' 'alterF' f k m = f
 -- ('lookup' k m)@.
 --
 -- Example:

containers/src/Data/IntSet/Internal.hs

@@ -503,7 +503,7 @@ deleteBM _ _ Nil = Nil
 -- In short:
 --
 -- @
--- 'member' x \<$\> 'alterF' f x s = f ('member' x s)
+-- 'member' x '<$>' 'alterF' f x s = f ('member' x s)
 -- @
 --
 -- Note: 'alterF' is a variant of the @at@ combinator from "Control.Lens.At".

containers/src/Data/Map/Internal.hs

@@ -1164,7 +1164,7 @@ data AreWeStrict = Strict | Lazy
 
 -- | \(O(\log n)\). The expression (@'alterF' f k map@) alters the value @x@ at
 -- @k@, or absence thereof.  'alterF' can be used to inspect, insert, delete,
--- or update a value in a 'Map'.  In short: @'lookup' k \<$\> 'alterF' f k m = f
+-- or update a value in a 'Map'.  In short: @'lookup' k '<$>' 'alterF' f k m = f
 -- ('lookup' k m)@.
 --
 -- Example:

containers/src/Data/Map/Strict/Internal.hs

@@ -817,7 +817,7 @@ alter = go
 
 -- | \(O(\log n)\). The expression (@'alterF' f k map@) alters the value @x@ at @k@, or absence thereof.
 -- 'alterF' can be used to inspect, insert, delete, or update a value in a 'Map'.
--- In short: @'lookup' k \<$\> 'alterF' f k m = f ('lookup' k m)@.
+-- In short: @'lookup' k '<$>' 'alterF' f k m = f ('lookup' k m)@.
 --
 -- Example:
 --

containers/src/Data/Set/Internal.hs

@@ -589,7 +589,7 @@ delete = go
 -- In short:
 --
 -- @
--- 'member' x \<$\> 'alterF' f x s = f ('member' x s)
+-- 'member' x '<$>' 'alterF' f x s = f ('member' x s)
 -- @
 --
 -- Note that unlike 'insert', 'alterF' will /not/ replace an element equal to