#1: Add unreleased title when the script update changelog

CHANGELOG.md

@@ -6,6 +6,11 @@ rename `Unreleased` topic with the new version tag. Finally, create a new `Unrel
 
 Wait!, you don't need to do this manually - use [ReleaseZri](https://github.com/codezri/releasezri)
 
+## Unreleased
+
+### Core: script
+- Add `## Unreleased` while updating the changelog with the latest version
+
 ## v1.0.3
 
 ### Core: template

scripts/rz.py

@@ -43,23 +43,25 @@ def save_release_note(note):
 
 def update_changelog():
     updated_changelog = ''
+    pre_replace = '''## Unreleased
+
+'''
     with open(CHANGELOG_FILE, 'r') as cf:
-        updated_changelog = cf.read().replace('## Unreleased', '## ' + VERSION)
+        replace_text = pre_replace + '## ' + VERSION
+        updated_changelog = cf.read().replace('## Unreleased', replace_text)
 
     with open(CHANGELOG_FILE, 'w') as cf:
         cf.write(updated_changelog)
 
 def create_note():
     print('INFO: Preparing release notes...')
     note = parse_release_note()
+    if note.strip() == '':
+        print('ERROR: No changelog so far.')
+        sys.exit(1)
     print('---- Release note for %s (parsed) ----' % VERSION)
-    print(note)
     print('----')
 
-    if note == '':
-        print('ERROR: No changelog.')
-        sys.exit(1)
-
     note = apply_notes_to_template(note)
     print('---- Release note for %s (applied to template) ----' % VERSION)
     print(note)