vim-patch:0c1a214: runtime(doc): Fix truncated sentence in :h map()

fixes: vim/vim#20725

https://github.com/vim/vim/commit/0c1a214497400a950f1e25f4163215ec930a4659

Co-authored-by: Christian Brabandt <cb@256bit.org>

runtime/doc/vimfn.txt

@@ -6291,7 +6291,7 @@ map({expr1}, {expr2})                                                    *map()*
 		Note that {expr2} is the result of an expression and is then
 		used as an expression again.  Often it is good to use a
 		|literal-string| to avoid having to double backslashes.  You
-		still have to double ' quotes
+		still have to double single (') quotes, though.
 
 		If {expr2} is a |Funcref| it is called with two arguments:
 			1. The key or the index of the current item.

runtime/lua/vim/_meta/vimfn.gen.lua

@@ -5602,7 +5602,7 @@ function vim.fn.log10(expr) end
 --- Note that {expr2} is the result of an expression and is then
 --- used as an expression again.  Often it is good to use a
 --- |literal-string| to avoid having to double backslashes.  You
---- still have to double ' quotes
+--- still have to double single (') quotes, though.
 ---
 --- If {expr2} is a |Funcref| it is called with two arguments:
 ---   1. The key or the index of the current item.