Small typo fix

util/markdown.go

@@ -37,7 +37,7 @@ var HtmlMdRenderer md.Renderer
 // MarkdownToHTML : convert markdown to html
 // TODO: restrict certain types of markdown
 func MarkdownToHTML(markdown string) template.HTML {
-	if len(markdown) >= 3 && markdown[:4] == ">" {
+	if len(markdown) >= 4 && markdown[:4] == ">" {
 		markdown = ">" + markdown[4:]
 	}
 	markdown = strings.Replace(markdown, "\n>", "\n>", -1)