cleanup and add email content

src/registrar/fixtures_users.py

@@ -39,7 +39,6 @@ class UserFixture:
             "username": "be17c826-e200-4999-9389-2ded48c43691",
             "first_name": "Matthew",
             "last_name": "Spence",
-            "email": "mspence1845@gmail.com"
         },
         {
             "username": "5f283494-31bd-49b5-b024-a7e7cae00848",
@@ -156,7 +155,6 @@ class UserFixture:
             "username": "d6bf296b-fac5-47ff-9c12-f88ccc5c1b99",
             "first_name": "Matthew-Analyst",
             "last_name": "Spence-Analyst",
-            "email": "mspence1845+1@gmail.com"
         },
         {
             "username": "319c490d-453b-43d9-bc4d-7d6cd8ff6844",

src/registrar/templates/emails/domain_change_notification.txt

@@ -1 +0,0 @@
-There has been a change to {{ domain }}

src/registrar/templates/emails/domain_change_notification_subject.txt

@@ -1 +0,0 @@
-Change Notification

src/registrar/templates/emails/update_to_approved_domain.txt

@@ -0,0 +1,23 @@
+Hi,
+An update was made to a domain you manage.
+DOMAIN: {{domain.gov}}
+UPDATED BY: {{user}}
+UPDATED ON: {{date}}
+INFORMATION UPDATED: {{changes}}
+You can view this update in the .gov registrar <https://manage.get.gov/>.
+
+
+Get help with managing your .gov domain <https://get.gov/help/domain-management/>.
+
+----------------------------------------------------------------
+WHY DID YOU RECEIVE THIS EMAIL? 
+You’re listed as a domain manager for $domain.gov, so you’ll receive a notification whenever changes are made to that domain.
+If you have questions or concerns, reach out to the person who made the change or reply to this email.
+
+THANK YOU
+.Gov helps the public identify official, trusted information. Thank you for using a .gov domain.
+
+----------------------------------------------------------------
+The .gov team
+Contact us <https://get.gov/contact/> 
+Learn about .gov <https://get.gov>

src/registrar/templates/emails/update_to_approved_domain_subject.txt

@@ -0,0 +1 @@
+An update was made to {{domain}}

src/registrar/views/domain.py

@@ -5,6 +5,7 @@ authorized users can see information on a domain, every view here should
 inherit from `DomainPermissionView` (or DomainInvitationPermissionDeleteView).
 """
 
+from datetime import date
 import logging
 
 from django.contrib import messages
@@ -146,6 +147,9 @@ class DomainFormBaseView(DomainBaseView, FormMixin):
             logger.info("Sending email to domain managers")
             context={
                         "domain": self.object,
+                        "user": self.request.user,
+                        "date": date.today(),
+                        "changes": form.changed_data
                     }
             self.email_domain_managers(self.object, "emails/domain_change_notification.txt", "emails/domain_change_notification_subject.txt", context)