Disable truthy-iterable by default

Author: cdce8p

mypy/errorcodes.py

@@ -164,6 +164,7 @@ def __str__(self) -> str:
     "truthy-iterable",
     "Warn about Iterable expressions that could always evaluate to true in boolean contexts",
     "General",
+    default_enabled=False,
 )
 NAME_MATCH: Final = ErrorCode(
     "name-match", "Check that type definition has consistent naming", "General"

test-data/unit/check-errorcodes.test

@@ -858,7 +858,7 @@ if not f:  # E: Function "Callable[[], Any]" could always be true in boolean con
 conditional_result = 'foo' if f else 'bar'  # E: Function "Callable[[], Any]" could always be true in boolean context  [truthy-function]
 
 [case testTruthyIterable]
-# flags: --strict-optional
+# flags: --strict-optional --enable-error-code truthy-iterable
 from typing import Iterable
 def func(var: Iterable[str]) -> None:
     if var:  # E: "var" has type "Iterable[str]" which can always be true in boolean context. Consider using "Collection[str]" instead.  [truthy-iterable]