Avoid 3 space indents

src/Development/IDE/Core/Preprocessor.hs

@@ -33,21 +33,21 @@ import Data.Maybe
 --   e.g. unlit/cpp. Return the resulting buffer and the DynFlags it implies.
 preprocessor :: GhcMonad m => FilePath -> Maybe StringBuffer -> ExceptT [FileDiagnostic] m (StringBuffer, DynFlags)
 preprocessor filename mbContents = do
-   -- Perform unlit
-   (isOnDisk, contents) <- if isLiterate filename then do
+    -- Perform unlit
+    (isOnDisk, contents) <- if isLiterate filename then do
         dflags <- getDynFlags
         newcontent <- liftIO $ runLhs dflags filename mbContents
         return (False, newcontent)
-   else do
-      contents <- liftIO $ maybe (hGetStringBuffer filename) return mbContents
-      let isOnDisk = isNothing mbContents
-      return (isOnDisk, contents)
+    else do
+        contents <- liftIO $ maybe (hGetStringBuffer filename) return mbContents
+        let isOnDisk = isNothing mbContents
+        return (isOnDisk, contents)
 
-   -- Perform cpp
-   dflags  <- ExceptT $ parsePragmasIntoDynFlags filename contents
-   if not $ xopt LangExt.Cpp dflags then
+    -- Perform cpp
+    dflags  <- ExceptT $ parsePragmasIntoDynFlags filename contents
+    if not $ xopt LangExt.Cpp dflags then
         return (contents, dflags)
-   else do
+    else do
         contents <- liftIO $ runCpp dflags filename $ if isOnDisk then Nothing else Just contents
         dflags <- ExceptT $ parsePragmasIntoDynFlags filename contents
         return (contents, dflags)