Remove detection of strings in B018 (#209)

Author: kasium

bugbear.py

@@ -639,7 +639,6 @@ def check_for_b018(self, node):
             if isinstance(
                 subnode.value,
                 (
-                    ast.Str,
                     ast.Num,
                     ast.Bytes,
                     ast.NameConstant,

tests/b018_classes.py

@@ -1,6 +1,6 @@
 """
 Should emit:
-B018 - on lines 15-26, 30, 32
+B018 - on lines 16-26, 30, 33
 """
 
 
@@ -30,3 +30,4 @@ class Foo3:
     123
     a = 2
     "str"
+    1

tests/b018_functions.py

@@ -1,6 +1,6 @@
 """
 Should emit:
-B018 - on lines 14-25, 29, 31
+B018 - on lines 15-25, 29, 32
 """
 
 
@@ -29,3 +29,4 @@ def foo3():
     123
     a = 2
     "str"
+    3

tests/test_bugbear.py

@@ -234,19 +234,19 @@ def test_b018_functions(self):
         bbc = BugBearChecker(filename=str(filename))
         errors = list(bbc.run())
 
-        expected = [B018(line, 4) for line in range(14, 26)]
+        expected = [B018(line, 4) for line in range(15, 26)]
         expected.append(B018(29, 4))
-        expected.append(B018(31, 4))
+        expected.append(B018(32, 4))
         self.assertEqual(errors, self.errors(*expected))
 
     def test_b018_classes(self):
         filename = Path(__file__).absolute().parent / "b018_classes.py"
         bbc = BugBearChecker(filename=str(filename))
         errors = list(bbc.run())
 
-        expected = [B018(line, 4) for line in range(15, 27)]
+        expected = [B018(line, 4) for line in range(16, 27)]
         expected.append(B018(30, 4))
-        expected.append(B018(32, 4))
+        expected.append(B018(33, 4))
         self.assertEqual(errors, self.errors(*expected))
 
     def test_b901(self):