diff --git a/activesupport/lib/active_support/notifications.rb b/activesupport/lib/active_support/notifications.rb
index 325a3d75dc..b9f8e1ab2c 100644
--- a/activesupport/lib/active_support/notifications.rb
+++ b/activesupport/lib/active_support/notifications.rb
@@ -16,7 +16,7 @@ module ActiveSupport
   #     render text: 'Foo'
   #   end
   #
-  # That executes the block first and notifies all subscribers once done.
+  # That first executes the block and then notifies all subscribers once done.
   #
   # In the example above +render+ is the name of the event, and the rest is called
   # the _payload_. The payload is a mechanism that allows instrumenters to pass
diff --git a/railties/lib/rails/commands/destroy.rb b/railties/lib/rails/commands/destroy.rb
index 5479da86a0..ce26cc3fde 100644
--- a/railties/lib/rails/commands/destroy.rb
+++ b/railties/lib/rails/commands/destroy.rb
@@ -1,5 +1,7 @@
 require 'rails/generators'
 
+#if no argument/-h/--help is passed to rails destroy command, then
+#it generates the help associated.
 if [nil, "-h", "--help"].include?(ARGV.first)
   Rails::Generators.help 'destroy'
   exit
diff --git a/railties/lib/rails/commands/generate.rb b/railties/lib/rails/commands/generate.rb
index 351c59c645..926c36b967 100644
--- a/railties/lib/rails/commands/generate.rb
+++ b/railties/lib/rails/commands/generate.rb
@@ -1,5 +1,7 @@
 require 'rails/generators'
 
+#if no argument/-h/--help is passed to rails generate command, then
+#it generates the help associated.
 if [nil, "-h", "--help"].include?(ARGV.first)
   Rails::Generators.help 'generate'
   exit