[linalg.transp.layout.transpose] Fix indentation

Author: Andreas-Krug

source/numerics.tex

@@ -13030,9 +13030,9 @@
         friend constexpr bool operator==(const mapping& x, const mapping<OtherExtents>& y);
     };
 
-    private:
-      @\exposid{nested-mapping-type}@ @\exposid{nested-mapping_}@;                       // \expos
-      extents_type @\exposid{extents_}@;                                     // \expos
+  private:
+    @\exposid{nested-mapping-type}@ @\exposid{nested-mapping_}@;                         // \expos
+    extents_type @\exposid{extents_}@;                                       // \expos
   };
 }
 \end{codeblock}