-ddump-splices omits required parentheses when printing view patterns
If you run this program:
```hs
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE ViewPatterns #-}
{-# OPTIONS_GHC -ddump-splices #-}
module Bug where
$([d| pattern P x <- (id -> x) |])
```
You'll get this output:
```
$ ghc-9.10.1 Bug.hs -dsuppress-uniques -ddump-splices
[1 of 1] Compiling Bug ( Bug.hs, Bug.o )
Bug.hs:7:2-34: Splicing declarations
[d| pattern P x <- (id -> x) |] ======> pattern P x <- id -> x
```
Note that the `-ddump-splices` output displays `pattern P x <- id -> x`. This is not valid code, since trying to copy-paste this into a file will make GHC produce a parse error:
```
$ ghc-9.10.1 Bug.hs
[1 of 1] Compiling Bug ( Bug.hs, Bug.o ) [Source file changed]
Bug.hs:8:19: error: [GHC-58481]
parse error on input ‘->’
|
8 | pattern P x <- id -> x
| ^^
```
I will investigate.
issue