Remove extraneous line from generated markdown (#1311)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

docs.go

@@ -15,7 +15,7 @@ import (
 // The function errors if either parsing or writing of the string fails.
 func (a *App) ToMarkdown() (string, error) {
 	var w bytes.Buffer
-	if err := a.writeDocTemplate(&w, 8); err != nil {
+	if err := a.writeDocTemplate(&w, 0); err != nil {
 		return "", err
 	}
 	return w.String(), nil

template.go

@@ -74,9 +74,9 @@ OPTIONS:
    {{end}}{{end}}
 `
 
-var MarkdownDocTemplate = `% {{ .App.Name }} {{ .SectionNum }}
+var MarkdownDocTemplate = `{{if gt .SectionNum 0}}% {{ .App.Name }} {{ .SectionNum }}
 
-# NAME
+{{end}}# NAME
 
 {{ .App.Name }}{{ if .App.Usage }} - {{ .App.Usage }}{{ end }}
 

testdata/expected-doc-full.md

@@ -1,5 +1,3 @@
-% greet 8
-
 # NAME
 
 greet - Some app

testdata/expected-doc-no-authors.md

@@ -1,5 +1,3 @@
-% greet 8
-
 # NAME
 
 greet - Some app

testdata/expected-doc-no-commands.md

@@ -1,5 +1,3 @@
-% greet 8
-
 # NAME
 
 greet - Some app

testdata/expected-doc-no-flags.md

@@ -1,5 +1,3 @@
-% greet 8
-
 # NAME
 
 greet - Some app

testdata/expected-doc-no-usagetext.md

@@ -1,5 +1,3 @@
-% greet 8
-
 # NAME
 
 greet - Some app