[ruby/logger] frozen_string_literal: true

https://github.com/ruby/logger/commit/a057eede7b

lib/logger.rb

@@ -237,7 +237,7 @@ class Logger
     name = File.basename(__FILE__)
   end
   rev ||= "v#{VERSION}"
-  ProgName = "#{name}/#{rev}".freeze
+  ProgName = "#{name}/#{rev}"
 
   include Severity
 
@@ -574,7 +574,7 @@ class Logger
 private
 
   # Severity label for logging (max 5 chars).
-  SEV_LABEL = %w(DEBUG INFO WARN ERROR FATAL ANY).each(&:freeze).freeze
+  SEV_LABEL = %w(DEBUG INFO WARN ERROR FATAL ANY).freeze
 
   def format_severity(severity)
     SEV_LABEL[severity] || 'ANY'

lib/logger/errors.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # not used after 1.2.7. just for compat.
 class Logger
   class Error < RuntimeError # :nodoc:

lib/logger/formatter.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 class Logger
   # Default formatter for log messages.
   class Formatter
-    Format = "%s, [%s#%d] %5s -- %s: %s\n".freeze
+    Format = "%s, [%s#%d] %5s -- %s: %s\n"
 
     attr_accessor :datetime_format
 
@@ -17,7 +19,7 @@ class Logger
   private
 
     def format_datetime(time)
-      time.strftime(@datetime_format || "%Y-%m-%dT%H:%M:%S.%6N ".freeze)
+      time.strftime(@datetime_format || "%Y-%m-%dT%H:%M:%S.%6N ")
     end
 
     def msg2str(msg)
@@ -25,8 +27,7 @@ class Logger
       when ::String
         msg
       when ::Exception
-        "#{ msg.message } (#{ msg.class })\n" <<
+        "#{ msg.message } (#{ msg.class })\n#{ (msg.backtrace || []).join("\n") }"
-          (msg.backtrace || []).join("\n")
       else
         msg.inspect
       end

lib/logger/log_device.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'period'
 
 class Logger

lib/logger/period.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Logger
   module Period
     module_function

lib/logger/severity.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Logger
   # Logging severity.
   module Severity