Issue #22186: Fix typos in Lib/.
Patch by Févry Thibault.
diff --git a/Lib/pdb.py b/Lib/pdb.py
index 42e605e..e28564b 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -301,7 +301,7 @@
# An 'Internal StopIteration' exception is an exception debug event
# issued by the interpreter when handling a subgenerator run with
# 'yield from' or a generator controled by a for loop. No exception has
- # actually occured in this case. The debugger uses this debug event to
+ # actually occurred in this case. The debugger uses this debug event to
# stop when the debuggee is returning from such generators.
prefix = 'Internal ' if (not exc_traceback
and exc_type is StopIteration) else ''