[atomics.ref.ops] Fix indentation (#8711)

Author: Andreas-Krug

source/threads.tex

@@ -3459,16 +3459,16 @@
 \indexlibrarymember{compare_exchange_strong}{atomic_ref<\placeholder{floating-point-type}>}%
 \begin{itemdecl}
 constexpr bool compare_exchange_weak(value_type& expected, value_type desired,
-                           memory_order success, memory_order failure) const noexcept;
+                                     memory_order success, memory_order failure) const noexcept;
 
 constexpr bool compare_exchange_strong(value_type& expected, value_type desired,
-                             memory_order success, memory_order failure) const noexcept;
+                                       memory_order success, memory_order failure) const noexcept;
 
 constexpr bool compare_exchange_weak(value_type& expected, value_type desired,
-                           memory_order order = memory_order::seq_cst) const noexcept;
+                                     memory_order order = memory_order::seq_cst) const noexcept;
 
 constexpr bool compare_exchange_strong(value_type& expected, value_type desired,
-                             memory_order order = memory_order::seq_cst) const noexcept;
+                                       memory_order order = memory_order::seq_cst) const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}