gh-39105: two more ruff checks activated
    
one of them fixed here ; also sorting the list of ignored checks

### 📝 Checklist

- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
    
URL: #39105
Reported by: Frédéric Chapoton
Reviewer(s): Tobias Diez

Author: Release Manager

src/sage/combinat/cluster_algebra_quiver/quiver_mutation_type.py

@@ -1985,7 +1985,7 @@ def __init__(self, *args):
         """
         data = args
         if len(data) < 2 or not all(isinstance(comp, QuiverMutationType_Irreducible) for comp in data):
-            return _mutation_type_error(data)
+            _mutation_type_error(data)
 
         # _info is initialized
         self._info = {}

src/sage/combinat/finite_state_machine.py

@@ -14717,7 +14717,7 @@ def __init__(self, *args, **kwargs):
         self.TapeCache = _FSMTapeCacheDetectEpsilon_
         self.visited_states = {}
         kwargs['check_epsilon_transitions'] = False
-        return super().__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     def _push_branch_(self, state, tape_cache, outputs):
         """
@@ -14842,7 +14842,7 @@ def __init__(self, *args, **kwargs):
         self.TapeCache = _FSMTapeCacheDetectAll_
         self.visited_states = {}
         kwargs['check_epsilon_transitions'] = False
-        return super().__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
 
 # ****************************************************************************

src/sage/groups/misc_gps/argument_groups.py

@@ -1006,7 +1006,7 @@ def __init__(self, category):
             Rational Field
         """
         from sage.rings.rational_field import QQ
-        return super().__init__(base=QQ, category=category)
+        super().__init__(base=QQ, category=category)
 
     def _repr_(self):
         r"""
@@ -1626,7 +1626,7 @@ def __init__(self, category):
             sage: S.base()  # indirect doctest
             <class 'int'>
         """
-        return super().__init__(base=int, category=category)
+        super().__init__(base=int, category=category)
 
     def _repr_(self):
         r"""

src/sage/modular/arithgroup/congroup_generic.py

@@ -464,7 +464,7 @@ def __init__(self, *args, **kwds):
             sage: sage.modular.arithgroup.congroup_generic.CongruenceSubgroup(5) # indirect doctest
             Generic congruence subgroup of level 5
         """
-        return CongruenceSubgroupBase.__init__(self, *args, **kwds)
+        CongruenceSubgroupBase.__init__(self, *args, **kwds)
 
     def _repr_(self):
         """

src/sage/repl/ipython_kernel/widgets.py

@@ -119,7 +119,7 @@ def __init__(self, *args, **kwds):
             <... 'dict'>
         """
         self.__transform = kwds.pop("transform", None)
-        return super().__init__(*args, **kwds)
+        super().__init__(*args, **kwds)
 
     def get_value(self):
         """

src/tox.ini

@@ -302,7 +302,6 @@ passenv = RUFF_OUTPUT_FORMAT
 #     12        F811    [*] Redefinition of unused `CompleteDiscreteValuationRings` from line 49
 #      8        PLC0414 [*] Import alias does not rename original package
 #      7        E743    [ ] Ambiguous function name: `I`
-#      7        PLE0101 [ ] Explicit return in `__init__`
 #      7        PLR0124 [ ] Name compared with itself, consider replacing `a == a`
 #      5        PLW0127 [ ] Self-assignment of variable `a`
 #      4        F541    [*] f-string without any placeholders
@@ -314,7 +313,7 @@ passenv = RUFF_OUTPUT_FORMAT
 #      1        F402    [ ] Import `factor` from line 259 shadowed by loop variable
 #      1        PLC0208 [*] Use a sequence type instead of a `set` when iterating over values
 #
-commands = ruff check --ignore PLR2004,I001,F401,E741,F821,PLR0912,PLR0913,E402,PLR0915,PLW2901,PLR5501,PLR0911,E731,F405,PLR1714,PLR1736,F403,PLR0402,PLW0603,F841,PLW0602,PLW0642,PLR1711,SIM101,PLR1704,PLW3301,PLW1510,E721,PLW0211,PLW0120,F811,PLC2401,PLC0414,E743,PLE0101,PLR0124,PLW0127,F541,PLW1508,PLC3002,E742,PLE0302,PLW0129,F402,PLC0208,PLC0206 {posargs:{toxinidir}/sage/}
+commands = ruff check --ignore E402,E721,E731,E741,E742,E743,F401,F402,F403,F405,F541,F811,F821,F841,I001,PLC0206,PLC0208,PLC0414,PLC2401,PLC3002,PLE0302,PLR0124,PLR0402,PLR0911,PLR0912,PLR0913,PLR0915,PLR1704,PLR1711,PLR1714,PLR1736,PLR2004,PLR5501,PLW0120,PLW0127,PLW0129,PLW0211,PLW0602,PLW0603,PLW0642,PLW1508,PLW1510,PLW2901,PLW3301 {posargs:{toxinidir}/sage/}
 
 [flake8]
 rst-roles =