Hi, thanks for the contribution!

Could you show a comparison of before/after?

// test.go
package main

import (
	"os"

	cli "github.com/urfave/cli/v2"
)

func main() {
	app := cli.NewApp()
	app.ArgsUsage = "[arg1]"
	app.Commands = []*cli.Command{
		{
			Name:      "cmd1",
			ArgsUsage: "[arg2]",
			Action: func(cctx *cli.Context) error {
				return nil
			},
		},
	}
	err := app.Run(os.Args)
	if err != nil {
		panic(err)
	}
}

go run test.go -h will print:

NAME:
   test - A new cli application

USAGE:
   test [global options] command [command options] [arg1]

COMMANDS:
   cmd1
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h  show help

but go run test.go cmd1 -h will print:

NAME:
   test cmd1

USAGE:
   test cmd1 [command options][arg2]

OPTIONS:
   --help, -h  show help

difference

there is no space between comand options and custom args usage.

   test [global options] command [command options] [arg1]

vs

   test cmd1 [command options][arg2]

The SubcommandHelpTemplate seems to have the same whitespace problem too. Would you mind taking a look as well?

cli/template.go

Lines 82 to 86 in 84c536d

	var SubcommandHelpTemplate = `NAME:
	{{template "helpNameTemplate" .}}
	USAGE:
	{{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}} {{if .VisibleFlags}}command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}{{if .Args}}[arguments...]{{end}}{{end}}{{end}}{{if .Description}}

I'm sorry that when modifying the code today, I missed some variables related to ArgsUsage for the sake of convenience in using the vim editor. The whitespace issue in the SubcommandHelpTemplate variable has now been fixed, and running 'go test ./...' shows no problems.

@caeret Sorry looks like I messed up the commit by force pushing v2-maint to your repo. . Can you repush your PR ? Also run "make docs" and "make v2approve"

Closed by mistake