diff --git a/Algorithms/QuadTree/QuadTree.hs b/Algorithms/QuadTree/QuadTree.hs
index ca9224d..46fc87d 100644
--- a/Algorithms/QuadTree/QuadTree.hs
+++ b/Algorithms/QuadTree/QuadTree.hs
@@ -187,10 +187,10 @@ findNeighbor ot zr = case ot of
       | is1 z = goUp z >>= go1
       | is2 z = goUp z >>= go2
       | otherwise = checkParent
-                      . go is1 is2 is3 go1 go2 go3 go4
-                      . fromJust
-                      . goUp
-                      $ z
+                    . go is1 is2 is3 go1 go2 go3 go4
+                    . fromJust
+                    . goUp
+                    $ z
       where
         checkParent (Just (z'@(TNode {}, _)))
           | is3 z     = go3 z'
diff --git a/GUI/Gtk.hs b/GUI/Gtk.hs
index 279ee8d..ad6f7e7 100644
--- a/GUI/Gtk.hs
+++ b/GUI/Gtk.hs
@@ -28,37 +28,37 @@ data MyGUI = MkMyGUI {
   -- |Tree Window
   treeWin :: Window,
   -- |delete Button
-  delButton  :: Button,
+  delButton :: Button,
   -- |save Button
-  saveButton  :: Button,
+  saveButton :: Button,
   -- |quit Button
-  quitButton  :: Button,
+  quitButton :: Button,
   -- |file chooser button
-  fileButton  :: FileChooserButton,
+  fileButton :: FileChooserButton,
   -- |drawing area
-  mainDraw  :: DrawingArea,
+  mainDraw :: DrawingArea,
   -- |drawing area for the tree
   treeDraw :: DrawingArea,
   -- |scaler for point thickness
-  ptScale  :: HScale,
+  ptScale :: HScale,
   -- |entry widget for lower x bound
-  xminEntry  :: Entry,
+  xminEntry :: Entry,
   -- |entry widget for upper x bound
-  xmaxEntry  :: Entry,
+  xmaxEntry :: Entry,
   -- |entry widget for lower y bound
-  yminEntry  :: Entry,
+  yminEntry :: Entry,
   -- |entry widget for upper y bound
-  ymaxEntry  :: Entry,
+  ymaxEntry :: Entry,
   -- |about dialog
-  aboutDialog  :: AboutDialog,
+  aboutDialog :: AboutDialog,
   -- |combo box for choosing the algorithm
-  algoBox  :: ComboBox,
+  algoBox :: ComboBox,
   -- |grid check button
-  gridCheckBox  :: CheckButton,
+  gridCheckBox :: CheckButton,
   -- |coord check button
-  coordCheckBox  :: CheckButton,
+  coordCheckBox :: CheckButton,
   -- |Path entry widget for the quad tree.
-  quadPathEntry  :: Entry,
+  quadPathEntry :: Entry,
   -- |Horizontal box containing the path entry widget.
   vbox7 :: Box
 }
@@ -81,8 +81,7 @@ makeMyGladeGUI = do
     <*> xmlGetWidget xml castToButton "drawButton"
     <*> xmlGetWidget xml castToButton "saveButton"
     <*> xmlGetWidget xml castToButton "quitButton"
-    <*> xmlGetWidget xml castToFileChooserButton
-          "filechooserButton"
+    <*> xmlGetWidget xml castToFileChooserButton "filechooserButton"
     <*> xmlGetWidget xml castToDrawingArea "drawingarea"
     <*> xmlGetWidget xml castToDrawingArea "treedrawingarea"
     <*> xmlGetWidget xml castToHScale "hscale"
@@ -120,21 +119,22 @@ makeGUI startFile = do
   comboBoxSetActive (algoBox mygui) 0
 
   -- callbacks
-  _ <- onDestroy  (rootWin mygui) mainQuit
-  _ <- onClicked  (delButton mygui) $ drawDiag mygui
-  _ <- onClicked  (saveButton mygui) $ saveDiag mygui
-  _ <- onClicked  (quitButton mygui) mainQuit
-  _ <- onResponse (aboutDialog mygui) (\x -> case x of
-                                ResponseCancel -> widgetHideAll (aboutDialog mygui)
-                                _ -> return ())
+  _ <- onDestroy  (rootWin mygui)     mainQuit
+  _ <- onClicked  (delButton mygui)   $ drawDiag mygui
+  _ <- onClicked  (saveButton mygui)  $ saveDiag mygui
+  _ <- onClicked  (quitButton mygui)  mainQuit
+  _ <- onResponse (aboutDialog mygui)
+         (\x -> case x of
+            ResponseCancel -> widgetHideAll (aboutDialog mygui)
+            _              -> return ())
   -- have to redraw for window overlapping and resizing on expose
   _ <- onExpose (mainDraw mygui) (\_ -> drawDiag mygui >>=
-                             (\_ -> return True))
+                                        (\_ -> return True))
   _ <- onExpose (treeDraw mygui) (\_ -> drawDiag mygui >>=
-                             (\_ -> return True))
-  _ <- on (algoBox mygui) changed (drawDiag mygui)
-  _ <- on (algoBox mygui) changed (onAlgoBoxChange mygui)
-  _ <- on (gridCheckBox mygui) toggled (drawDiag mygui)
+                                        (\_ -> return True))
+  _ <- on (algoBox mygui)       changed (drawDiag mygui)
+  _ <- on (algoBox mygui)       changed (onAlgoBoxChange mygui)
+  _ <- on (gridCheckBox mygui)  toggled (drawDiag mygui)
   _ <- on (coordCheckBox mygui) toggled (drawDiag mygui)
 
   -- hotkeys
diff --git a/Graphics/Diagram/Plotter.hs b/Graphics/Diagram/Plotter.hs
index 1bc417f..129c7f4 100644
--- a/Graphics/Diagram/Plotter.hs
+++ b/Graphics/Diagram/Plotter.hs
@@ -258,9 +258,9 @@ treePretty = Diag f
 -- by the dimensions given in xDimension from DiagProp.
 xAxis :: Diag
 xAxis =
-  Diag hRule      <>
-    Diag segments <>
-    Diag labels
+  Diag hRule
+  <> Diag segments
+  <> Diag labels
   where
     hRule p _ =
       arrowAt (p2 (diagXmin p, if diagYmin p <= 0 then 0 else diagYmin p))
@@ -286,9 +286,9 @@ xAxis =
 -- by the dimensions given in yDimension from DiagProp.
 yAxis :: Diag
 yAxis =
-  Diag vRule      <>
-    Diag segments <>
-    Diag labels
+  Diag vRule
+  <> Diag segments
+  <> Diag labels
   where
     vRule p _ =
       arrowAt (p2 (if diagXmin p <= 0 then 0 else diagXmin p, diagYmin p))