Add missing Haddock documentation

Author: mpilgrem

src/Stack/Ghci.hs

@@ -195,10 +195,10 @@ data GhciPkgDesc = GhciPkgDesc
   , target :: !Target
   }
 
--- Mapping from a module name to a map with all of the paths that use that name.
--- Each of those paths is associated with a set of components that contain it.
--- The purpose of this complex structure is for use in
--- 'checkForDuplicateModules'.
+-- | Type synonym representing maps from a module name to a map with all of the
+-- paths that use that name. Each of those paths is associated with a set of
+-- components that contain it. The purpose of this complex structure is for use
+-- in 'checkForDuplicateModules'.
 type ModuleMap =
   Map ModuleName (Map (Path Abs File) (Set (PackageName, NamedComponent)))
 

src/Stack/Options/BuildParser.hs

@@ -127,6 +127,7 @@ buildOptsParser cmd = BuildOptsCLI
         <> internal
         )
 
+-- | Parser for build targets. Also used by the @stack dot@ command.
 targetsParser :: Parser [Text]
 targetsParser =
   many (textArgument
@@ -138,6 +139,7 @@ targetsParser =
             \for details."
     ))
 
+-- | Parser for the @--flag@ option, for Cabal flags.
 flagsParser :: Parser (Map.Map ApplyCLIFlag (Map.Map FlagName Bool))
 flagsParser = Map.unionsWith Map.union
   <$> many (option readFlag