Fix PR template and add info to changelog script (#237)

.github/pull_request_template.md

@@ -1,14 +1,20 @@
-Closes #
-
-[Context]
+Closes # (if there is a related issue)
 
 ### What does this do
 
-[high-level description of features]
+[high-level description of what this PR does]
+
+### Why are we doing this
+
+[description of why]
+
+### How should this be tested
+
+[what tests have been written, any tests to perform after merging and deploying?]
 
-### Callouts
+### Migrations
 
-[anything you want to call out]
+[post SQL here]
 
 ### Dependencies
 

scripts/generate_changelog.py

@@ -10,7 +10,16 @@
 def generate_changelog(owner, repo, version):
     github = GitHubClient()
     release_dt = github.get_release_date(owner, repo, version)
-    return github.get_commit_messages(owner, repo, release_dt)
+    messages = github.get_commit_messages(owner, repo, release_dt)
+
+    # generate changelog
+    if not messages:
+        return []
+
+    output = ["### Changes", ""]
+    for message in messages:
+        output.append("- " + message)
+    return output
 
 
 class GitHubClient:
@@ -63,5 +72,4 @@ def parse_args():
     repo = "busy-beaver"
 
     changelog = generate_changelog(owner, repo, version)
-    print()
     print("\n".join(changelog))