vim-patch:9.0.1515: reverse() does not work for a String

Problem:    reverse() does not work for a String.
Solution:   Implement reverse() for a String. (Yegappan Lakshmanan,
            closes vim/vim#12179)

03ff1c2dde

vim-patch:9.0.1738: Duplicate code to reverse a string

Problem:  Duplicate code to reverse a string
Solution: Move reverse_text() to strings.c and remove string_reverse().

closes: vim/vim#12847

4dd266cb66

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/eval.lua

@@ -8151,11 +8151,13 @@ M.funcs = {
     args = 1,
     base = 1,
     desc = [=[
-      Reverse the order of items in {object} in-place.
-      {object} can be a |List| or a |Blob|.
-      Returns {object}.
-      Returns zero if {object} is not a List or a Blob.
-      If you want an object to remain unmodified make a copy first: >vim
+      Reverse the order of items in {object}.  {object} can be a
+      |List|, a |Blob| or a |String|.  For a List and a Blob the
+      items are reversed in-place and {object} is returned.
+      For a String a new String is returned.
+      Returns zero if {object} is not a List, Blob or a String.
+      If you want a List or Blob to remain unmodified make a copy
+      first: >vim
       	let revlist = reverse(copy(mylist))
       <
     ]=],