[{hive,vector}.capacity] Move remarks from Complexity to Remarks element (#8323)

Author: eisenwave

source/containers.tex

@@ -8470,11 +8470,11 @@
 
 \pnum
 \complexity
-It does not change the size of the sequence and
-takes at most linear time in the number of reserved blocks allocated.
+Linear in the number of reserved blocks allocated.
 
 \pnum
 \remarks
+The size of the sequence is not changed.
 All references, pointers, and iterators referring to elements in \tcode{*this},
 as well as the past-the-end iterator, remain valid.
 \end{itemdescr}
@@ -10174,11 +10174,11 @@
 
 \pnum
 \complexity
-It does not change the size of the sequence and takes at most linear
-time in the size of the sequence.
+Linear in the size of the sequence.
 
 \pnum
 \remarks
+The size of the sequence is not changed.
 Reallocation invalidates all the references, pointers, and iterators
 referring to the elements in the sequence, as well as the past-the-end iterator.
 \begin{note}