Add ability to autosave functions at the end of funced

doc_src/funced.txt

@@ -16,3 +16,5 @@ If there is no function called `NAME` a new function will be created with the sp
 - `-e command` or `--editor command` Open the function body inside the text editor given by the command (for example, `-e vi`). The special command `fish` will use the built-in editor (same as specifying `-i`).
 
 - `-i` or `--interactive` Force opening the function body in the built-in editor even if `$VISUAL` or `$EDITOR` is defined.
+
+- `-s` or `--save` Automatically save the function after successfully editing it.

share/functions/funced.fish

@@ -12,7 +12,7 @@ function __funced_md5
 end
 
 function funced --description 'Edit function definition'
-    set -l options 'h/help' 'e/editor=' 'i/interactive'
+    set -l options 'h/help' 'e/editor=' 'i/interactive' 's/save'
     argparse -n funced --min-args=1 --max-args=1 $options -- $argv
     or return
 
@@ -65,6 +65,9 @@ function funced --description 'Edit function definition'
             echo -n $cmd | fish_indent | read -lz cmd
             eval "$cmd"
         end
+        if set -q _flag_save
+            funcsave $funcname
+        end
         return 0
     end
 
@@ -115,6 +118,8 @@ function funced --description 'Edit function definition'
                     continue
                 end
                 echo (_ "Cancelled function editing")
+            else if set -q _flag_save
+                funcsave $funcname
             end
         end
         break