diff --git a/libcxx/include/deque b/libcxx/include/deque
--- a/libcxx/include/deque
+++ b/libcxx/include/deque
@@ -2920,11 +2920,9 @@
 
 #else // _LIBCPP_STD_VER <= 17
 
-template<class _Tp, class _Allocator>
-inline _LIBCPP_HIDE_FROM_ABI
-__synth_three_way_result<_Tp>
-operator<=>(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y)
-{
+template <class _Tp, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<_Tp>
+operator<=>(const deque<_Tp, _Allocator>& __x, const deque<_Tp, _Allocator>& __y) {
     return std::lexicographical_compare_three_way(
         __x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way<_Tp, _Tp>);
 }
diff --git a/libcxx/include/forward_list b/libcxx/include/forward_list
--- a/libcxx/include/forward_list
+++ b/libcxx/include/forward_list
@@ -1774,12 +1774,9 @@
 
 #else // #if _LIBCPP_STD_VER <= 17
 
-template<class _Tp, class _Allocator>
-inline _LIBCPP_HIDE_FROM_ABI
-__synth_three_way_result<_Tp>
-operator<=>(const forward_list<_Tp, _Allocator>& __x,
-            const forward_list<_Tp, _Allocator>& __y)
-{
+template <class _Tp, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<_Tp>
+operator<=>(const forward_list<_Tp, _Allocator>& __x, const forward_list<_Tp, _Allocator>& __y) {
     return std::lexicographical_compare_three_way(
         __x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way<_Tp, _Tp>);
 }
diff --git a/libcxx/include/list b/libcxx/include/list
--- a/libcxx/include/list
+++ b/libcxx/include/list
@@ -2345,11 +2345,9 @@
 
 #else // _LIBCPP_STD_VER <= 17
 
-template<class _Tp, class _Allocator>
-inline _LIBCPP_HIDE_FROM_ABI
-__synth_three_way_result<_Tp>
-operator<=>(const list<_Tp, _Allocator>& __x, const list<_Tp, _Allocator>& __y)
-{
+template <class _Tp, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<_Tp>
+operator<=>(const list<_Tp, _Allocator>& __x, const list<_Tp, _Allocator>& __y) {
     return std::lexicographical_compare_three_way(
         __x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way<_Tp, _Tp>);
 }
diff --git a/libcxx/include/map b/libcxx/include/map
--- a/libcxx/include/map
+++ b/libcxx/include/map
@@ -1737,12 +1737,9 @@
 
 #else // #if _LIBCPP_STD_VER <= 17
 
-template<class _Key, class _Tp, class _Compare, class _Allocator>
-inline _LIBCPP_HIDE_FROM_ABI
-__synth_three_way_result<pair<const _Key, _Tp>>
-operator<=>(const map<_Key, _Tp, _Compare, _Allocator>& __x,
-            const map<_Key, _Tp, _Compare, _Allocator>& __y)
-{
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<pair<const _Key, _Tp>>
+operator<=>(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) {
     return std::lexicographical_compare_three_way(
         __x.begin(),
         __x.end(),
@@ -2351,12 +2348,10 @@
 
 #else // #if _LIBCPP_STD_VER <= 17
 
-template<class _Key, class _Tp, class _Compare, class _Allocator>
-inline _LIBCPP_HIDE_FROM_ABI
-__synth_three_way_result<pair<const _Key, _Tp>>
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<pair<const _Key, _Tp>>
 operator<=>(const multimap<_Key, _Tp, _Compare, _Allocator>& __x,
-            const multimap<_Key, _Tp, _Compare, _Allocator>& __y)
-{
+            const multimap<_Key, _Tp, _Compare, _Allocator>& __y) {
     return std::lexicographical_compare_three_way(
         __x.begin(),
         __x.end(),