chore: polish changelog generator

.gitchangelog.rc

@@ -1,27 +1,23 @@
 ignore_regexps = [
     r'Merge branch',
-    r'docs:',
     r'[Bb]ump version'
 ]
 
 section_regexps = [
     ('New features', [
-        r'^[Ff]eat:(.*)'
+        r'^[Ff]eat:'
     ]),
     ('Bug fixes', [
         r'^[Ff]ix:'
     ]),
-    ('Changes', [
-        r'^[Cc]hore:'
-    ]),
-    ('Other', None),
+    ('Other changes', None),
 ]
 
 
 include_merges = False
 body_process = noop
 subject_process = (strip |
-    ReSub(r'^([Cc]hore|[Ff]ix|[Ff]eat)\s*:\s*(.*)$', r'\2') |
+    ReSub(r'^(\w+)\s*:\s*(.*)$', r'\2') |
     SetIfEmpty("No commit message.") | ucfirst | final_dot)
 
 tag_filter_regexp = r'^v[0-9]+\.[0-9]+(\.[0-9]+)?$'