Make wording changes

Author: JonRowe

features/matchers/send_email_matcher.feature

@@ -2,14 +2,14 @@ Feature: `send_email` matcher
 
   The `send_email` matcher is used to check if an email with the given parameters has been sent inside the expectation block.
 
-  NOTE: It implies that the spec example actually sends the email using the test adapter and does not schedule it for background.
+  NOTE: This matcher implies that the example(s) actually send email(s) using the test adapter, and *not* scheduled as a job to be sent in the background later.
 
   To have an email sent in tests make sure:
   - `ActionMailer` performs deliveries - `Rails.application.config.action_mailer.perform_deliveries = true`
   - If the email is sent asynchronously (with `.deliver_later` call), ActiveJob uses the inline adapter - `Rails.application.config.active_job.queue_adapter = :inline`
   - ActionMailer uses the test adapter - `Rails.application.config.action_mailer.delivery_method = :test`
 
-  If you want to check an email has been scheduled for background, use the `have_enqueued_email` matcher.
+  If you want to check an email has been scheduled as a job, use the `have_enqueued_email` matcher.
 
   Scenario: Checking email sent with the given multiple parameters
     Given a file named "spec/mailers/notifications_mailer_spec.rb" with: