copy edits [ci skip]

guides/source/action_mailer_basics.md

@@ -403,7 +403,7 @@ If you wish to override the default delivery options (e.g. SMTP credentials) whi
 
 ```ruby
 class UserMailer < ActionMailer::Base
-  def welcome_email(user,company)
+  def welcome_email(user, company)
     @user = user
     @url  = user_url(@user)
     delivery_options = { user_name: company.smtp_user, password: company.smtp_password, address: company.smtp_host }
@@ -414,12 +414,12 @@ end
 
 ### Sending Emails without Template Rendering
 
-There may be cases in which you want to skip the template rendering step and supply the email body as a string. You can achive this using the `:body` option.
+There may be cases in which you want to skip the template rendering step and supply the email body as a string. You can achieve this using the `:body` option.
 In such cases don't forget to add the `:content_type` option. Rails will default to `text/plain` otherwise.
 
 ```ruby
 class UserMailer < ActionMailer::Base
-  def welcome_email(user,email_body)
+  def welcome_email(user, email_body)
     mail(to: user.email, body: email_body, content_type: "text/html", subject: "Already rendered!")
   end
 end

guides/source/active_record_querying.md

@@ -1248,7 +1248,7 @@ User.where(state: 'inactive')
 ```
 
 As you can see above the `default_scope` is being overridden by both
-`scope` and `where` condition.
+`scope` and `where` conditions.
 
 
 ### Applying a default scope