No need for a parameter for `Baguette::Configuration#get`

src/baguette-crystal-base.cr

@@ -12,7 +12,7 @@ class Baguette::Configuration
 		# Check for provided file first,
 		# then $XDG_CONFIG_HOME/<class>.yml,
 		# then /etc/baguette/<class>.yml.
-		def self.get(file : String?)
+		def self.get(file : String? = nil)
 			filename = "/" + (self.name.downcase.gsub /baguette::configuration::/, "") + ".yml"
 			directory = "/baguette"