Sort block tag list alphabetically

markdown.go

@@ -105,43 +105,43 @@ const (
 // These are the tags that are recognized as HTML block tags.
 // Any of these can be included in markdown text without special escaping.
 var blockTags = map[string]bool{
-	"p":          true,
+	"blockquote": true,
+	"del":        true,
+	"div":        true,
 	"dl":         true,
+	"fieldset":   true,
+	"form":       true,
 	"h1":         true,
 	"h2":         true,
 	"h3":         true,
 	"h4":         true,
 	"h5":         true,
 	"h6":         true,
-	"ol":         true,
-	"ul":         true,
-	"del":        true,
-	"div":        true,
-	"ins":        true,
-	"pre":        true,
-	"form":       true,
-	"math":       true,
-	"table":      true,
 	"iframe":     true,
+	"ins":        true,
+	"math":       true,
+	"noscript":   true,
+	"ol":         true,
+	"pre":        true,
+	"p":          true,
 	"script":     true,
 	"style":      true,
-	"fieldset":   true,
-	"noscript":   true,
-	"blockquote": true,
+	"table":      true,
+	"ul":         true,
 
 	// HTML5
-	"video":      true,
+	"article":    true,
 	"aside":      true,
 	"canvas":     true,
+	"figcaption": true,
 	"figure":     true,
 	"footer":     true,
 	"header":     true,
 	"hgroup":     true,
 	"output":     true,
-	"article":    true,
-	"section":    true,
 	"progress":   true,
-	"figcaption": true,
+	"section":    true,
+	"video":      true,
 }
 
 // Renderer is the rendering interface.