Skip B905 automaically if python <3.10 is used

Closes PyCQA#320

README.rst

@@ -202,7 +202,7 @@ for details.
 
 **B905**: ``zip()`` without an explicit `strict=` parameter set. ``strict=True`` causes the resulting iterator
 to raise a ``ValueError`` if the arguments are exhausted at differing lengths. The ``strict=`` argument
-was added in Python 3.10, so don't enable this flag for code that should work on <3.10.
+was added in Python 3.10, so the check is disabled when running on python <3.10.
 For more information: https://peps.python.org/pep-0618/
 
 **B906**: ``visit_`` function with no further call to a ``visit`` function. This is often an error, and will stop the visitor from recursing into the subnodes of a visited node. Consider adding a call ``self.generic_visit(node)`` at the end of the function.

bugbear.py

@@ -4,6 +4,7 @@
 import logging
 import math
 import re
+import sys
 from collections import namedtuple
 from contextlib import suppress
 from functools import lru_cache, partial
@@ -980,7 +981,8 @@ def check_for_b025(self, node):
 
     def check_for_b905(self, node):
         if (
-            isinstance(node.func, ast.Name)
+            sys.version_info >= (3, 10)
+            and isinstance(node.func, ast.Name)
             and node.func.id == "zip"
             and not any(kw.arg == "strict" for kw in node.keywords)
         ):

tests/test_bugbear.py

@@ -494,20 +494,23 @@ def test_b904(self):
         ]
         self.assertEqual(errors, self.errors(*expected))
 
-    @unittest.skipIf(sys.version_info < (3, 10), "requires 3.10+")
     def test_b905(self):
-        filename = Path(__file__).absolute().parent / "b905_py310.py"
-        bbc = BugBearChecker(filename=str(filename))
-        errors = list(bbc.run())
-        expected = [
-            B905(1, 0),
-            B905(2, 0),
-            B905(3, 0),
-            B905(4, 0),
-            B905(4, 15),
-            B905(5, 4),
-            B905(6, 0),
-        ]
+        filename = Path(__file__).absolute().parent / "b905.py"
+        bbc = BugBearChecker(filename=str(filename))
+        errors = list(bbc.run())
+        expected = (
+            [
+                B905(1, 0),
+                B905(2, 0),
+                B905(3, 0),
+                B905(4, 0),
+                B905(4, 15),
+                B905(5, 4),
+                B905(6, 0),
+            ]
+            if sys.version_info >= (3, 10)
+            else []
+        )
         self.assertEqual(errors, self.errors(*expected))
 
     def test_b906(self):