update open to use argparse

share/functions/open.fish

@@ -2,16 +2,16 @@
 # This allows us to use 'open FILENAME' to open a given file in the default
 # application for the file.
 #
-
 if not command -sq open
     function open --description "Open file in default application"
-        if count $argv >/dev/null
-            switch $argv[1]
-                case -h --h --he --hel --help
+        set -l options 'h/help'
+        argparse -n open --min-args=1 $options -- $argv
+        or return
+
+        if set -q _flag_help
             __fish_print_help open
             return 0
         end
-        end
 
         if type -q -f cygstart
             for i in $argv