[mdspan.layout] Remove superfluous spacing around \seebelow (#6961)

Author: hewillk

source/containers.tex

@@ -20999,10 +20999,10 @@
       constexpr explicit(extents_type::rank() > 0)
         mapping(const layout_stride::mapping<OtherExtents>&);
     template<class LayoutLeftPaddedMapping>
-      constexpr explicit( @\seebelow@ )
+      constexpr explicit(@\seebelow@)
         mapping(const LayoutLeftPaddedMapping&);
     template<class LayoutRightPaddedMapping>
-      constexpr explicit( @\seebelow@ )
+      constexpr explicit(@\seebelow@)
         mapping(const LayoutRightPaddedMapping&) noexcept;
 
     constexpr mapping& operator=(const mapping&) noexcept = default;
@@ -21622,10 +21622,10 @@
       constexpr explicit(rank_ > 0)
         mapping(const layout_stride::mapping<OtherExtents>&);
     template<class LayoutRightPaddedMapping>
-      constexpr explicit( @\seebelow@ )
+      constexpr explicit(@\seebelow@)
         mapping(const LayoutRightPaddedMapping&);
     template<class LayoutLeftPaddedMapping>
-      constexpr explicit( @\seebelow@ )
+      constexpr explicit(@\seebelow@)
         mapping(const LayoutLeftPaddedMapping&) noexcept;
 
     constexpr mapping& operator=(const mapping&) noexcept = default;
@@ -21963,7 +21963,7 @@
 \indexlibraryctor{layout_right_padded::mapping}%
 \begin{itemdecl}
 template<class LayoutRightPaddedMapping>
-  constexpr explicit( @\seebelow@ )
+  constexpr explicit(@\seebelow@)
     mapping(const LayoutRightPaddedMapping& other);
 \end{itemdecl}
 
@@ -22029,7 +22029,7 @@
 \indexlibraryctor{layout_right_padded::mapping}%
 \begin{itemdecl}
 template<class LayoutLeftPaddedMapping>
-  constexpr explicit( @\seebelow@ )
+  constexpr explicit(@\seebelow@)
     mapping(const LayoutLeftPaddedMapping& other) noexcept;
 \end{itemdecl}