Update .xnode -> .xrb.

Author: ioquatix

lib/utopia/content.rb

@@ -137,9 +137,9 @@ def lookup_content(name, parent_path)
 			if Path === name
 				name = parent_path + name
 				name_path = name.components.dup
-				name_path[-1] += XNODE_EXTENSION
+				name_path[-1] += EXTENSION
 			else
-				name_path = name + XNODE_EXTENSION
+				name_path = name + EXTENSION
 			end
 
 			components = parent_path.components.dup

lib/utopia/content/link.rb

@@ -37,9 +37,9 @@ def key
 				end
 			end
 
-			def full_path(root, extension = XNODE_EXTENSION)
+			def full_path(root, extension = EXTENSION)
 				if @path&.file?
-					File.join(root, @path.dirname, self.key + XNODE_EXTENSION)
+					File.join(root, @path.dirname, self.key + EXTENSION)
 				end
 			end
 

lib/utopia/content/links.rb

@@ -10,7 +10,7 @@
 module Utopia
 	class Content
 		# The file extension for markup nodes on disk.
-		XNODE_EXTENSION = ".xnode"
+		EXTENSION = ".xrb"
 		INDEX = "index"
 
 		class Links
@@ -24,7 +24,7 @@ def self.index(root, path, **options)
 				self.new(root).index(path, **options)
 			end
 
-			def initialize(root, extension: XNODE_EXTENSION)
+			def initialize(root, extension: EXTENSION)
 				@root = root
 
 				@extension = extension