A few more of typo fixes/skip as detected with bleeding edge codespell

.codespellrc

@@ -1,6 +1,6 @@
 [codespell]
 skip = .git,*.pdf,*.svg,*._comment,jquery.*.js,*.mdwn,changelog,CHANGELOG,list.2018,html,dist,dist-newstyle,.stack-work,man,tags,tmp
-ignore-regex=\bvalUs\b
+ignore-regex=\b(valUs|addIn)\b
 # some common variables etc (case insensitive)
 # keypair - constructs
 ## May be TODO later, touches too much

Assistant/Threads/Cronner.hs

@@ -1,4 +1,4 @@
-{- git-annex assistant sceduled jobs runner
+{- git-annex assistant scheduled jobs runner
  -
  - Copyright 2013 Joey Hess <id@joeyh.name>
  -

Git/Fsck.hs

@@ -125,7 +125,7 @@ knownMissing :: FsckResults -> MissingObjects
 knownMissing FsckFailed = S.empty
 knownMissing (FsckFoundMissing s _) = s
 
-{- Finds objects that are missing from the git repsitory, or are corrupt.
+{- Finds objects that are missing from the git repository, or are corrupt.
  -
  - This does not use git cat-file --batch, because catting a corrupt
  - object can cause it to crash, or to report incorrect size information.