*** New value 'historical' for user option 'completions-sort'
When 'completions-sort' is set to 'historical', completion candidates
-will be sorted by their chronological order in the minibuffer history,
-with more recent candidates appearing first.
+will be first sorted alphabetically, and then re-sorted by their order
+in the minibuffer history, with more recent candidates appearing first.
** Pcomplete
If it's the symbol `alphabetical', candidates are sorted by
`minibuffer-sort-alphabetically'.
If it's the symbol `historical', candidates are sorted by
-`minibuffer-sort-by-history'.
+`minibuffer-sort-by-history', which first sorts alphabetically,
+and then rearranges the order according to the order of the
+candidates in the minibuffer history.
If it's a function, the function is called to sort the candidates.
The sorting function takes a list of completion candidate
strings, which it may modify; it should return a sorted list,