fix typos in AR. lots of them.

4 files changed, 4 insertions, 4 deletions

diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb
index e0bfdb8f3e..aa92343f76 100644
--- a/activerecord/lib/active_record/attribute_methods.rb
+++ b/activerecord/lib/active_record/attribute_methods.rb
@@ -21,7 +21,7 @@ module ActiveRecord
       # Generates all the attribute related methods for columns in the database
       # accessors, mutators and query methods.
       def define_attribute_methods # :nodoc:
-        # Use a mutex; we don't want two thread simaltaneously trying to define
+        # Use a mutex; we don't want two thread simultaneously trying to define
         # attribute methods.
         @attribute_methods_mutex.synchronize do
           return if attribute_methods_generated?
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
index 2859fb31e8..c0a2111571 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
@@ -21,7 +21,7 @@ module ActiveRecord
       # limit is enforced by rails and Is less than or equal to
       # <tt>index_name_length</tt>. The gap between
       # <tt>index_name_length</tt> is to allow internal rails
-      # opreations to use prefixes in temporary opreations.
+      # operations to use prefixes in temporary operations.
       def allowed_index_name_length
         index_name_length
       end
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
index 73c80a3220..2b6685499a 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/transaction.rb
@@ -78,7 +78,7 @@ module ActiveRecord
         @joinable  = options.fetch(:joinable, true)
       end
 
-      # This state is necesarry so that we correctly handle stuff that might
+      # This state is necessary so that we correctly handle stuff that might
       # happen in a commit/rollback. But it's kinda distasteful. Maybe we can
       # find a better way to structure it in the future.
       def finishing?
diff --git a/activerecord/lib/active_record/explain.rb b/activerecord/lib/active_record/explain.rb
index 3135465dfe..15736575a2 100644
--- a/activerecord/lib/active_record/explain.rb
+++ b/activerecord/lib/active_record/explain.rb
@@ -9,7 +9,7 @@ module ActiveRecord
       yield
       return current[:available_queries_for_explain]
     ensure
-      # Note that the return value above does not depend on this assigment.
+      # Note that the return value above does not depend on this assignment.
       current[:available_queries_for_explain] = original
     end