run codespell throughout fixing typos automagically

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

Database/Handle.hs

@@ -70,7 +70,7 @@ closeDb (DbHandle _db worker jobs _) = do
  - changes to the database!
  -
  - Note that the action is not run by the calling thread, but by a
- - worker thread. Exceptions are propigated to the calling thread.
+ - worker thread. Exceptions are propagated to the calling thread.
  -
  - Only one action can be run at a time against a given DbHandle.
  - If called concurrently in the same process, this will block until