Capitalize short desc for completion command

Author: fcjr

completions.go

@@ -589,7 +589,7 @@ func (c *Command) initDefaultCompletionCmd() {
 
 	completionCmd := &Command{
 		Use:   compCmdName,
-		Short: "generate the autocompletion script for the specified shell",
+		Short: "Generate the autocompletion script for the specified shell",
 		Long: fmt.Sprintf(`
 Generate the autocompletion script for %[1]s for the specified shell.
 See each sub-command's help for details on how to use the generated script.
@@ -601,7 +601,7 @@ See each sub-command's help for details on how to use the generated script.
 
 	out := c.OutOrStdout()
 	noDesc := c.CompletionOptions.DisableDescriptions
-	shortDesc := "generate the autocompletion script for %s"
+	shortDesc := "Generate the autocompletion script for %s"
 	bash := &Command{
 		Use:   "bash",
 		Short: fmt.Sprintf(shortDesc, "bash"),

completions_test.go

@@ -125,7 +125,7 @@ func TestCmdNameCompletionInGo(t *testing.T) {
 
 	expected = strings.Join([]string{
 		"aliased\tA command with aliases",
-		"completion\tgenerate the autocompletion script for the specified shell",
+		"completion\tGenerate the autocompletion script for the specified shell",
 		"firstChild\tFirst command",
 		"help\tHelp about any command",
 		"secondChild",
@@ -580,7 +580,7 @@ func TestFlagNameCompletionInGoWithDesc(t *testing.T) {
 
 	expected := strings.Join([]string{
 		"childCmd\tfirst command",
-		"completion\tgenerate the autocompletion script for the specified shell",
+		"completion\tGenerate the autocompletion script for the specified shell",
 		"help\tHelp about any command",
 		":4",
 		"Completion ended with directive: ShellCompDirectiveNoFileComp", ""}, "\n")