Fix typos in code comments

lib/rackstash/adapters/file.rb

@@ -34,8 +34,9 @@ module Rackstash
     #
     #     Rackstash::Adapters::File.new('/var/log/rackstash/my_app.log')
     #
-    # you can rotate the file with a config for the the standard
-    # [logrotate](https://github.com/logrotate/logrotate) utility like this:
+    # you can rotate the file with a config for the standard
+    # [logrotate](https://github.com/logrotate/logrotate) utility similar to
+    # this example:
     #
     #     /var/log/rackstash/my_app.log {
     #       daily

lib/rackstash/fields/abstract_collection.rb

@@ -19,7 +19,7 @@ module Rackstash
     class AbstractCollection
       include Rackstash::Helpers::UTF8
 
-      # Equality -- Two collections are equal if they are of exactly the same
+      # Equality - Two collections are equal if they are of exactly the same
       # class and contain the same raw data according to `Object#==`.
       #
       # @return [Boolean] `true` if `other` is an object of the same class and

lib/rackstash/logger.rb

@@ -420,11 +420,11 @@ module Rackstash
     #       buffer.flush if buffer
     #     end
     #
-    # By using the `begin ... ensure` block, you can enfore that the buffer is
-    # actually poped and flushed afte the execution leaves your environment,
-    # even in an Exception is raised. If you omit to pop the Buffer from the
+    # By using the `begin ... ensure` block, you can enforce that the buffer is
+    # actually poped and flushed after the execution leaves your environment,
+    # even if an Exception is raised. If you omit to pop the Buffer from the
     # stack, weird things can happen and your logs will probably end up not
-    # being consistent or even flushed.
+    # being consistent or not even flushed at all.
     #
     # @see #pop_buffer
     #