Fix other flake8 complaints

E231 missing whitespace after ','
E265 block comment should start with '# '
E266 too many leading '#' for block comment
E302 expected 2 blank lines, found 1
E501 line too long (115 > 88 characters)
E713 test for membership should be 'not in'
E722 do not use bare 'except'
F812 list comprehension redefines 'g' from line 1499
F821 undefined name 'cmp'
F841 local variable 'ex' is assigned to but never used

JIRA: COMPOSE-4108
Signed-off-by: Haibo Lin <hlin@redhat.com>

pungi/util.py

@@ -543,7 +543,7 @@ def find_old_compose(
                 with open(status_path, "r") as f:
                     if f.read().strip() in allowed_statuses:
                         composes.append((_sortable(i), os.path.abspath(path)))
-            except:
+            except Exception:
                 continue
 
     if not composes: