[bitwise.operations] Fix indentation (cplusplus#9037)

Author: Andreas-Krug

source/utilities.tex

@@ -13580,7 +13580,7 @@
 \indexlibrarymember{operator()}{bit_and<>}%
 \begin{itemdecl}
 template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-    -> decltype(std::forward<T>(t) & std::forward<U>(u));
+  -> decltype(std::forward<T>(t) & std::forward<U>(u));
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -13622,7 +13622,7 @@
 \indexlibrarymember{operator()}{bit_or<>}%
 \begin{itemdecl}
 template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-    -> decltype(std::forward<T>(t) | std::forward<U>(u));
+  -> decltype(std::forward<T>(t) | std::forward<U>(u));
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -13664,7 +13664,7 @@
 \indexlibrarymember{operator()}{bit_xor<>}%
 \begin{itemdecl}
 template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-    -> decltype(std::forward<T>(t) ^ std::forward<U>(u));
+  -> decltype(std::forward<T>(t) ^ std::forward<U>(u));
 \end{itemdecl}
 
 \begin{itemdescr}
@@ -13705,7 +13705,7 @@
 \indexlibrarymember{operator()}{bit_not<>}%
 \begin{itemdecl}
 template<class T> constexpr auto operator()(T&& t) const
-    -> decltype(~std::forward<T>(t));
+  -> decltype(~std::forward<T>(t));
 \end{itemdecl}
 
 \begin{itemdescr}