3 files changed, 8 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 0c50826c63..90b8a29869 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -947,7 +947,7 @@ module ActiveRecord
 
       def migrations_paths
         @migrations_paths ||= ['db/migrate']
-        # just to not break things if someone uses: migration_path = some_string
+        # just to not break things if someone uses: migrations_path = some_string
         Array(@migrations_paths)
       end
 
diff --git a/activerecord/lib/active_record/migration/command_recorder.rb b/activerecord/lib/active_record/migration/command_recorder.rb
index 4c4afb4dbd..0fa665c7e0 100644
--- a/activerecord/lib/active_record/migration/command_recorder.rb
+++ b/activerecord/lib/active_record/migration/command_recorder.rb
@@ -9,6 +9,7 @@ module ActiveRecord
     # * add_index
     # * add_reference
     # * add_timestamps
+    # * change_column
     # * change_column_default (must supply a :from and :to option)
     # * change_column_null
     # * create_join_table
@@ -18,6 +19,7 @@ module ActiveRecord
     # * drop_table (must supply a block)
     # * enable_extension
     # * remove_column (must supply a type)
+    # * remove_columns (must specify at least one column name or more)
     # * remove_foreign_key (must supply a second table)
     # * remove_index
     # * remove_reference
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb
index e596df8742..36cdeed489 100644
--- a/activerecord/lib/active_record/relation.rb
+++ b/activerecord/lib/active_record/relation.rb
@@ -400,11 +400,11 @@ module ActiveRecord
     #   people = Person.where(group: 'expert')
     #   people.update(group: 'masters')
     #
-    #   Note: Updating a large number of records will run a
-    #   UPDATE query for each record, which may cause a performance
-    #   issue. So if it is not needed to run callbacks for each update, it is
-    #   preferred to use <tt>update_all</tt> for updating all records using
-    #   a single query.
+    # Note: Updating a large number of records will run an
+    # UPDATE query for each record, which may cause a performance
+    # issue. So if it is not needed to run callbacks for each update, it is
+    # preferred to use <tt>update_all</tt> for updating all records using
+    # a single query.
     def update(id = :all, attributes)
       if id.is_a?(Array)
         id.map.with_index { |one_id, idx| update(one_id, attributes[idx]) }