fix(release): preserve multi-line changelog bodies in package mirrors

update_debian_changelog and update_spec_changelog wrapped the whole release message in a single prefixed line, so only the first line of a multi-line (already-bulleted) message was indented/dashed while the rest stayed at column 0. That made dpkg-parsechangelog emit 'badly formatted heading line' and rpmspec report 'bad date', failing the package build. Each non-empty body line is now indented (Debian) or dash-prefixed (RPM) individually.

update_changelog no longer auto-prepends a '* ' bullet to the CHANGELOG.md entry: the message is inserted verbatim with blank-line separation, so a caller-provided markdown list stays markdown-lint-clean instead of gaining a stray leading bullet.

Adds regression tests for the multi-line debian/rpm mirroring and the no-injected-bullet behaviour.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/pkgmgr/actions/release/files/changelog_md.py

@@ -73,7 +73,8 @@ def update_changelog(
             else:
                 message = editor_message
 
-    entry = f"## [{new_version}] - {today}\n\n* {message}\n\n"
+    body = message.strip() if message and message.strip() else f"Release {new_version}."
+    entry = f"## [{new_version}] - {today}\n\n{body}\n\n"
 
     if os.path.exists(changelog_path):
         try:

src/pkgmgr/actions/release/files/debian.py

@@ -47,10 +47,17 @@ def update_debian_changelog(
     author_name, author_email = _get_debian_author()
 
     first_line = f"{package_name} ({debian_version}) unstable; urgency=medium"
-    body_line = message.strip() if message else f"Automated release {new_version}."
+    body = (
+        message.strip()
+        if message and message.strip()
+        else f"Automated release {new_version}."
+    )
+    indented_body = "\n".join(
+        f"  {line}" if line.strip() else line for line in body.split("\n")
+    )
     stanza = (
         f"{first_line}\n\n"
-        f"  * {body_line}\n\n"
+        f"{indented_body}\n\n"
         f" -- {author_name} <{author_email}>  {date_str}\n\n"
     )
 

src/pkgmgr/actions/release/files/rpm_changelog.py

@@ -30,11 +30,18 @@ def update_spec_changelog(
     date_str = now.strftime("%a %b %d %Y")
 
     author_name, author_email = _get_debian_author()
-    body_line = message.strip() if message else f"Automated release {new_version}."
+    body = (
+        message.strip()
+        if message and message.strip()
+        else f"Automated release {new_version}."
+    )
+    dashed_body = "\n".join(
+        f"- {line}" if line.strip() else line for line in body.split("\n")
+    )
 
     stanza = (
         f"* {date_str} {author_name} <{author_email}> - {debian_version}\n"
-        f"- {body_line}\n\n"
+        f"{dashed_body}\n\n"
     )
 
     marker = "%changelog"