[flat.multiset.defn] Fix indentation (#8687)

Author: Andreas-Krug

source/containers.tex

@@ -19770,7 +19770,7 @@
 
     constexpr flat_multiset(sorted_equivalent_t, initializer_list<value_type> il,
                             const key_compare& comp = key_compare())
-        : flat_multiset(sorted_equivalent, il.begin(), il.end(), comp) { }
+      : flat_multiset(sorted_equivalent, il.begin(), il.end(), comp) { }
 
     // \ref{flat.multiset.cons.alloc}, constructors with allocators
 
@@ -19977,7 +19977,7 @@
       -> flat_multiset<Key, Compare>;
 
   template<class Key, class Compare = less<Key>>
-  flat_multiset(sorted_equivalent_t, initializer_list<Key>, Compare = Compare())
+    flat_multiset(sorted_equivalent_t, initializer_list<Key>, Compare = Compare())
       -> flat_multiset<Key, Compare>;
 
   template<class Key, class Compare, class KeyContainer, class Allocator>