Removed max=, added sprintf support to logging methods/macros

src/logger.cr

@@ -71,18 +71,16 @@ module Logger
     end
   end
 
-  {% for level in %w[ min max ] %}
-    def self.{{level.id}}=(selection : String) : Nil
+  def self.min=(selection : String) : Nil
     Logger.debug "Entering with #{selection}"
     raise "ERROR : {{level.id}}= : Invalid level" unless _level = LOG_LEVELS[selection.upcase]
     synchronize {
-        @@{{level.id}}_level = _level
+      @@min_level = _level
     }
   end
-    def self.{{level.id}} : String
-      @@{{level.id}}_level.to_s.downcase
+  def self.min : String
+    @@min_level.to_s.downcase
   end
-  {% end %}
 
   def self.valid?(level : LOG_LEVEL) : Bool
     level.in?(@@min_level.value..@@max_level.value)
@@ -95,8 +93,9 @@ module Logger
     Logger.debug "Debug set to #{state}"
   end
 
-  def self.log(level : String, message : String)
+  def self.log(level : String, message : String, *args)
     _level = LOG_LEVELS[level]
+    message = message % args unless args.empty?
     if valid?(_level) || debug?
       synchronize {
           time = Time.local