Merge branch 'ad/rebase-i-serie-typofix' into maint

Typofix.

* ad/rebase-i-serie-typofix:
  rebase -i: fix comment typo

git-rebase--interactive.sh

@@ -722,7 +722,7 @@ collapse_todo_ids() {
 	git rebase--helper --shorten-ids
 }
 
-# Add commands after a pick or after a squash/fixup serie
+# Add commands after a pick or after a squash/fixup series
 # in the todo list.
 add_exec_commands () {
 	{