[meta.type.synop] Delete extra space before is_nothrow_copy_assignable

Author: Dawn Perchik

source/utilities.tex

@@ -12921,7 +12921,7 @@
   template <class T> struct is_nothrow_move_constructible;
 
   template <class T, class U> struct is_nothrow_assignable;
-  template <class T> struct  is_nothrow_copy_assignable;
+  template <class T> struct is_nothrow_copy_assignable;
   template <class T> struct is_nothrow_move_assignable;
 
   template <class T, class U> struct is_nothrow_swappable_with;