3 files changed, 2 insertions, 7 deletions
diff --git a/activesupport/lib/active_support/buffered_logger.rb b/activesupport/lib/active_support/buffered_logger.rb
index 36e29644c6..0595446189 100644
--- a/activesupport/lib/active_support/buffered_logger.rb
+++ b/activesupport/lib/active_support/buffered_logger.rb
@@ -1,8 +1,5 @@
-require 'thread'
-require 'active_support/core_ext/class/attribute_accessors'
 require 'active_support/deprecation'
 require 'active_support/logger'
-require 'fileutils'
 
 module ActiveSupport
   BufferedLogger = ActiveSupport::Deprecation::DeprecatedConstantProxy.new(
diff --git a/activesupport/lib/active_support/configurable.rb b/activesupport/lib/active_support/configurable.rb
index a2d2719de7..a8aa53a80f 100644
--- a/activesupport/lib/active_support/configurable.rb
+++ b/activesupport/lib/active_support/configurable.rb
@@ -1,7 +1,5 @@
 require 'active_support/concern'
 require 'active_support/ordered_options'
-require 'active_support/core_ext/kernel/singleton_class'
-require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/array/extract_options'
 
 module ActiveSupport
diff --git a/activesupport/lib/active_support/tagged_logging.rb b/activesupport/lib/active_support/tagged_logging.rb
index 4e2e1a1ff5..b60bc94db4 100644
--- a/activesupport/lib/active_support/tagged_logging.rb
+++ b/activesupport/lib/active_support/tagged_logging.rb
@@ -22,7 +22,7 @@ module ActiveSupport
       tags.concat new_tags
       yield
     ensure
-      new_tags.size.times { tags.pop }
+      tags.pop(new_tags.size)
     end
 
     def add(severity, message = nil, progname = nil, &block)
@@ -51,7 +51,7 @@ module ActiveSupport
     def tags_text
       tags = current_tags
       if tags.any?
-        tags.collect { |tag| "[#{tag}]" }.join(" ") + " "
+        tags.collect { |tag| "[#{tag}] " }.join
       end
     end