add a flag to disable autogen tag in man and markdown generators

Inherits from parent commands all the way to root

command.go

@@ -93,6 +93,8 @@ type Command struct {
 	PersistentPostRun func(cmd *Command, args []string)
 	// PersistentPostRunE: PersistentPostRun but returns an error
 	PersistentPostRunE func(cmd *Command, args []string) error
+	// DisableAutoGenTag remove
+	DisableAutoGenTag bool
 	// Commands is the list of commands supported by this program.
 	commands []*Command
 	// Parent Command for this command
@@ -474,15 +476,29 @@ func (c *Command) SuggestionsFor(typedName string) []string {
 	return suggestions
 }
 
+func (c *Command) VisitParents(fn func(*Command)) {
+	var traverse func(*Command) *Command
+
+	traverse = func(x *Command) *Command {
+		if x != c {
+			fn(x)
+		}
+		if x.HasParent() {
+			return traverse(x.parent)
+		}
+		return x
+	}
+	traverse(c)
+}
+
 func (c *Command) Root() *Command {
 	var findRoot func(*Command) *Command
 
 	findRoot = func(x *Command) *Command {
 		if x.HasParent() {
 			return findRoot(x.parent)
-		} else {
-			return x
 		}
+		return x
 	}
 
 	return findRoot(c)