make both member.swap.pass.cpp files clang-format friendly

Author: jiixyj

libcxx/test/std/utilities/expected/expected.expected/swap/member.swap.pass.cpp

@@ -70,7 +70,7 @@ static_assert(!HasMemberSwap<MoveMayThrow, MoveMayThrow>);
 
 // Test noexcept
 template <class T, class E>
-concept MemberSwapNoexcept =
+concept MemberSwapNoexcept = //
     requires(std::expected<T, E> x, std::expected<T, E> y) {
       { x.swap(y) } noexcept;
     };

libcxx/test/std/utilities/expected/expected.void/swap/member.swap.pass.cpp

@@ -52,7 +52,7 @@ struct MoveMayThrow {
 };
 
 template <class E>
-concept MemberSwapNoexcept =
+concept MemberSwapNoexcept = //
     requires(std::expected<void, E> x, std::expected<void, E> y) {
       { x.swap(y) } noexcept;
     };