fix(medusa): filter completions by the current word cur

Author: akinomyoga

completions/medusa

@@ -16,7 +16,7 @@ _comp_cmd_medusa()
             ;;
         -*M)
             COMPREPLY=($(compgen -W "$("$1" -d | awk '/^ +\+/ {print $2}' |
-                command sed -e 's/\.mod$//')"))
+                command sed -e 's/\.mod$//')" -- "$cur"))
             return
             ;;
     esac