s/an/a/

railties/guides/source/action_view_overview.textile

@@ -929,7 +929,7 @@ Creates a scope around a specific model object like form_for, but doesn‘t crea
 
 h5. file_field
 
-Returns an file upload input tag tailored for accessing a specified attribute.
+Returns a file upload input tag tailored for accessing a specified attribute.
 
 <ruby>
 file_field(:user, :avatar)

railties/guides/source/active_record_validations_callbacks.textile

@@ -429,7 +429,7 @@ end
 
 The +validates_with+ helper takes a class, or a list of classes to use for validation. There is no default error message for +validates_with+. You must manually add errors to the record's errors collection in the validator class.
 
-To implement the validate method, you must have an +record+ parameter defined, which is the record to be validated.
+To implement the validate method, you must have a +record+ parameter defined, which is the record to be validated.
 
 Like all other validations, +validates_with+ takes the +:if+, +:unless+ and +:on+ options. If you pass any other options, it will send those options to the validator class as +options+:
 

railties/guides/source/contributing_to_ruby_on_rails.textile

@@ -90,7 +90,7 @@ This command will install all dependencies except the MySQL and PostgreSQL Ruby
 $ rake test
 </shell>
 
-You can also run tests for an specific framework, like Action Pack, by going into its directory and executing the same command:
+You can also run tests for a specific framework, like Action Pack, by going into its directory and executing the same command:
 
 <shell>
 $ cd actionpack