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

Database/Keys.hs

@@ -491,7 +491,7 @@ reconcileStaged dbisnew qh = ifM isBareRepo
 
 	-- How large is large? Too large and there will be a long
 	-- delay before the message is shown; too short and the message
-	-- will clutter things up unncessarily. It's uncommon for 1000
+	-- will clutter things up unnecessarily. It's uncommon for 1000
 	-- files to change in the index, and processing that many files
 	-- takes less than half a second, so that seems about right.
 	largediff :: Int