[DATALAD RUNCMD] run codespell throughout fixing few left typos autom…

…agically

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

billiard/util.py

@@ -219,7 +219,7 @@ def set_pdeathsig(sig):
             libc = ctypes.cdll.LoadLibrary("libc.so.6")
             libc.prctl(PR_SET_PDEATHSIG, ctypes.c_int(sig))
     except Exception as e:
-        raise OSError("An error occured while setting pdeathsig") from e
+        raise OSError("An error occurred while setting pdeathsig") from e
 
 def _eintr_retry(func):
     '''

t/integration/tests/test_multiprocessing.py

@@ -22,7 +22,7 @@
     from billiard._ext import _billiard
 except ImportError as exc:
     raise pytest.skip(exc)
-# import threading after _billiard to raise a more revelant error
+# import threading after _billiard to raise a more relevant error
 # message: "No module named _billiard". _billiard is not compiled
 # without thread support.
 import threading
@@ -750,7 +750,7 @@ def test_event(self):
         event = self.Event()
         wait = TimingWrapper(event.wait)
 
-        # Removed temporaily, due to API shear, this does not
+        # Removed temporarily, due to API shear, this does not
         # work with threading._Event objects. is_set == isSet
         self.assertEqual(event.is_set(), False)