Improve verbose mode output formatting

lib/producer/core/env.rb

@@ -9,9 +9,6 @@ module Producer
         @output   = output
         @registry = registry
         @remote   = remote
-        @logger   = Logger.new(output)
-
-        self.log_level = Logger::ERROR
       end
 
       def remote
@@ -26,6 +23,15 @@ module Producer
         @registry[key] = value
       end
 
+      def logger
+        @logger ||= begin
+          logger = Logger.new(output)
+          logger.level = Logger::ERROR
+          logger.formatter = LoggerFormatter.new
+          logger
+        end
+      end
+
       def log(message)
         logger.info message
       end

lib/producer/core/logger_formatter.rb

@@ -0,0 +1,9 @@
+module Producer
+  module Core
+    class LoggerFormatter < Logger::Formatter
+      def call(severity, datetime, progname, message)
+        message + "\n"
+      end
+    end
+  end
+end