Keep closing lines of email together for translation purposes

lms/templates/emails/account_creation_and_enroll_emailMessage.txt

@@ -9,6 +9,6 @@ ${_("password: {password}").format(password=password)}
 
 ${_("It is recommended that you change your password.")}
 
-${_("Sincerely yours,")}
+${_("Sincerely yours,
 
-${_("The {course_name} Team").format(course_name=course.display_name_with_default)}
+The {course_name} Team").format(course_name=course.display_name_with_default)}

lms/templates/emails/registration_codes_sale_email.txt

@@ -6,8 +6,8 @@ ${_("An invoice for {currency_symbol}{total_price} is attached. Payment is due i
 
 ${_("A CSV file of your registration codes is attached. Please distribute registration codes to each student planning to enroll using the email template below.")}
 
-${_("Thanks,")}
-${_("Your {platform_name} Team").format(platform_name=platform_name)}
+${_("Thanks,
+Your {platform_name} Team").format(platform_name=platform_name)}
 
 
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