* ioccur.el: Merge Stefan changes from ELPA.
Mark unused arg.
(ioccur-print-line): Remove unused `regexp' arg.
(ioccur-find-buffer-matching1): Remove redundant "with hist".
(savehist-save-minibuffer-history): Declare.
(ioccur-goto-line): Simplify and make sure `org-reveal' is defined.
(ioccur-jump): Remove unused var `back-search-fn'.