[gcc r12-9297] libstdc++: Remove template-head from std::expected<void> ctor [PR109182]

[Jonathan Wakely]

https://gcc.gnu.org/g:03f745992715872982d86bf2085f956bf0173b50

commit r12-9297-g03f745992715872982d86bf2085f956bf0173b50
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Mar 20 09:30:58 2023 +0000

    libstdc++: Remove template-head from std::expected<void> ctor [PR109182]
    
    The presence of a template-head on this constructor is a copy & paste
    error from the primary template.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/109182
            * include/std/expected (expected<void>::expected(in_place_t)):
            Remove template-head.

Diff:
---
 libstdc++-v3/include/std/expected | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/libstdc++-v3/include/std/expected b/libstdc++-v3/include/std/expected
index 2fe25a90d2d..95c2559e8f1 100644
--- a/libstdc++-v3/include/std/expected
+++ b/libstdc++-v3/include/std/expected
@@ -993,11 +993,10 @@ namespace __expected
 	: _M_unex(std::move(__u).error()), _M_has_value(false)
 	{ }
 
-      template<typename... _Args>
-	constexpr explicit
-	expected(in_place_t) noexcept
-	: expected()
-	{ }
+      constexpr explicit
+      expected(in_place_t) noexcept
+      : expected()
+      { }
 
       template<typename... _Args>
 	requires is_constructible_v<_Er, _Args...>