refactor: replace IOError with OSError

<https://peps.python.org/pep-3151/>

Author: e-kwsm

gunicorn/http/errors.py

@@ -13,7 +13,7 @@ class ParseException(Exception):
     pass
 
 
-class NoMoreData(IOError):
+class NoMoreData(OSError):
     def __init__(self, buf=None):
         self.buf = buf
 
@@ -89,15 +89,15 @@ def __str__(self):
         return "Unsupported transfer coding: %r" % self.hdr
 
 
-class InvalidChunkSize(IOError):
+class InvalidChunkSize(OSError):
     def __init__(self, data):
         self.data = data
 
     def __str__(self):
         return "Invalid chunk size: %r" % self.data
 
 
-class ChunkMissingTerminator(IOError):
+class ChunkMissingTerminator(OSError):
     def __init__(self, term):
         self.term = term
 

tests/test_pidfile.py

@@ -15,7 +15,7 @@ def builtin(name):
 @mock.patch(builtin('open'), new_callable=mock.mock_open)
 def test_validate_no_file(_open):
     pidfile = gunicorn.pidfile.Pidfile('test.pid')
-    _open.side_effect = IOError(errno.ENOENT)
+    _open.side_effect = OSError(errno.ENOENT)
     assert pidfile.validate() is None