mysql2 adapter instead of mysql [ci skip]

activerecord/lib/active_record/connection_adapters/abstract/quoting.rb

@@ -93,7 +93,7 @@ def quote_table_name(table_name)
       # Override to return the quoted table name for assignment. Defaults to
       # table quoting.
       #
-      # This works for mysql and mysql2 where table.column can be used to
+      # This works for mysql2 where table.column can be used to
       # resolve ambiguity.
       #
       # We override this in the sqlite3 and postgresql adapters to use only

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -106,7 +106,7 @@ def attributes_for_hash
 
       ##
       # :singleton-method:
-      # By default, the MysqlAdapter will consider all columns of type <tt>tinyint(1)</tt>
+      # By default, the Mysql2Adapter will consider all columns of type <tt>tinyint(1)</tt>
       # as boolean. If you wish to disable this emulation (which was the default
       # behavior in versions 0.13.1 and earlier) you can add the following line
       # to your application.rb file:
@@ -400,7 +400,7 @@ def execute(sql, name = nil)
         log(sql, name) { @connection.query(sql) }
       end
 
-      # MysqlAdapter has to free a result after using it, so we use this method to write
+      # Mysql2Adapter has to free a result after using it, so we use this method to write
       # stuff in an abstract way without concerning ourselves about whether it needs to be
       # explicitly freed or not.
       def execute_and_free(sql, name = nil) #:nodoc:

guides/source/configuring.md

@@ -319,7 +319,7 @@ All these configuration options are delegated to the `I18n` library.
 
 The MySQL adapter adds one additional configuration option:
 
-* `ActiveRecord::ConnectionAdapters::MysqlAdapter.emulate_booleans` controls whether Active Record will consider all `tinyint(1)` columns in a MySQL database to be booleans and is true by default.
+* `ActiveRecord::ConnectionAdapters::Mysql[2]Adapter.emulate_booleans` controls whether Active Record will consider all `tinyint(1)` columns in a MySQL database to be booleans and is true by default.
 
 The schema dumper adds one additional configuration option: