Apply codespell -w throughout

Types/Backend.hs

@@ -23,7 +23,7 @@ data BackendA a = Backend
 	, verifyKeyContent :: Maybe (Key -> RawFilePath -> a Bool)
 	-- Incrementally verifies the content of a key, using the same
 	-- hash as verifyKeyContent, but with the content provided
-	-- incrementally a peice at a time, until finalized.
+	-- incrementally a piece at a time, until finalized.
 	, verifyKeyContentIncrementally :: Maybe (Key -> a IncrementalVerifier)
 	-- Checks if a key can be upgraded to a better form.
 	, canUpgradeKey :: Maybe (Key -> Bool)

Types/Difference.hs

@@ -34,9 +34,9 @@ import Prelude
 -- Describes differences from the v5 repository format.
 --
 -- The serialization is stored in difference.log, so avoid changes that
--- would break compatability.
+-- would break compatibility.
 --
--- Not breaking compatability is why a list of Differences is used, rather
+-- Not breaking compatibility is why a list of Differences is used, rather
 -- than a record type. With a record type, adding a new field for some future
 -- difference would serialize to a value that an older version could not
 -- parse, even if that new field was not used. With the Differences list,

Types/FileMatcher.hs

@@ -98,7 +98,7 @@ data MatchFiles a = MatchFiles
 type FileMatcher a = Matcher (MatchFiles a)
 
 -- This is a matcher that can have tokens added to it while it's being
--- built, and once complete is compiled to an unchangable matcher.
+-- built, and once complete is compiled to an unchangeable matcher.
 data ExpandableMatcher a
 	= BuildingMatcher [Token (MatchFiles a)]
 	| CompleteMatcher (Matcher (MatchFiles a))

Types/Import.hs

@@ -58,7 +58,7 @@ data ImportableContents info = ImportableContents
 	{ importableContents :: [(ImportLocation, info)]
 	, importableHistory :: [ImportableContents info]
 	-- ^ Used by remotes that support importing historical versions of
-	-- files that are stored in them. This is equivilant to a git
+	-- files that are stored in them. This is equivalent to a git
 	-- commit history.
 	--
 	-- When retrieving a historical version of a file,

Types/Remote.hs

@@ -137,7 +137,7 @@ data RemoteA a = Remote
 	, getRepo :: a Git.Repo
 	-- a Remote's configuration from git
 	, gitconfig :: RemoteGitConfig
-	-- a Remote can be assocated with a specific local filesystem path
+	-- a Remote can be associated with a specific local filesystem path
 	, localpath :: Maybe FilePath
 	-- a Remote can be known to be readonly
 	, readonly :: Bool