and change default to disabled.
search string used as the string to replace.
+++
-** New user option `isearch-resume-enabled'.
-This option can be disabled, to avoid the normal behavior of isearch
-which puts calls to `isearch-resume' in the command history.
+** Isearch no longer adds `isearch-resume' commands to the command
+history by default. To enable this feature, customize the new
+user option `isearch-resume-in-command-history'.
+++
** New user option `history-delete-duplicates'.