diff --git a/hammerspoon/init.lua b/hammerspoon/init.lua
index 251ccca..8ba31ed 100644
--- a/hammerspoon/init.lua
+++ b/hammerspoon/init.lua
@@ -1,7 +1,7 @@
 -- luacheck: read_globals hs
 
 -- Reload config hotkey
-hs.hotkey.bind({"cmd", "alt", "ctrl"}, "R", hs.reload)
+hs.hotkey.bind({'cmd', 'alt', 'ctrl'}, 'R', hs.reload)
 
 --------------------------------------------------------------------------------
 -- Set Hammerspoon options
@@ -35,4 +35,4 @@ spoon.HeadphoneAutoPause:start()
 
 
 -- the end
-hs.alert.show("Hammerspoon loaded")
+hs.alert.show('Hammerspoon loaded')
diff --git a/hammerspoon/window_management.lua b/hammerspoon/window_management.lua
index 9db234a..c484a4c 100644
--- a/hammerspoon/window_management.lua
+++ b/hammerspoon/window_management.lua
@@ -24,7 +24,7 @@ function wm:init ()
   --
 
   -- show interactive grid menu
-  bind({"cmd", "ctrl"}, "2",
+  bind({'cmd', 'ctrl'}, '2',
     function()
       self.grid.setGrid(self.gridSizes.interactive)
       self.grid.show(
@@ -36,61 +36,61 @@ function wm:init ()
   )
 
   -- left half
-  bind({"cmd", "ctrl"}, "J", self.adjustWindow(0, 0, 15, 20))
+  bind({'cmd', 'ctrl'}, 'J', self.adjustWindow(0, 0, 15, 20))
   -- right half
-  bind({"cmd", "ctrl"}, "L", self.adjustWindow(15, 0, 15, 20))
+  bind({'cmd', 'ctrl'}, 'L', self.adjustWindow(15, 0, 15, 20))
   -- top half
-  bind({"cmd", "ctrl"}, "I", self.adjustWindow(0, 0, 30, 10))
+  bind({'cmd', 'ctrl'}, 'I', self.adjustWindow(0, 0, 30, 10))
   -- bottom half
-  bind({"cmd", "ctrl"}, "K", self.adjustWindow(0, 10, 30, 10))
+  bind({'cmd', 'ctrl'}, 'K', self.adjustWindow(0, 10, 30, 10))
 
   -- left narrow
-  bind({"ctrl", "alt"}, "U", self.adjustWindow(0, 0, 12, 20))
+  bind({'ctrl', 'alt'}, 'U', self.adjustWindow(0, 0, 12, 20))
   -- right narrow
-  bind({"ctrl", "alt"}, "O", self.adjustWindow(18, 0, 12, 20))
+  bind({'ctrl', 'alt'}, 'O', self.adjustWindow(18, 0, 12, 20))
 
   -- left wide
-  bind({"cmd", "ctrl"}, "U", self.adjustWindow(0, 0, 18, 20))
+  bind({'cmd', 'ctrl'}, 'U', self.adjustWindow(0, 0, 18, 20))
   -- right wide
-  bind({"cmd", "ctrl"}, "O", self.adjustWindow(12, 0, 18, 20))
+  bind({'cmd', 'ctrl'}, 'O', self.adjustWindow(12, 0, 18, 20))
 
   -- left fat
-  bind({"ctrl", "alt"}, "J", self.adjustWindow(0, 0, 21, 20))
+  bind({'cmd', 'ctrl', 'alt'}, 'J', self.adjustWindow(0, 0, 21, 20))
   -- right wide
-  bind({"ctrl", "alt"}, "L", self.adjustWindow(9, 0, 21, 20))
+  bind({'cmd', 'ctrl', 'alt'}, 'L', self.adjustWindow(9, 0, 21, 20))
   -- top fat
-  bind({"ctrl", "alt"}, "I", self.adjustWindow(0, 0, 30, 14))
+  bind({'cmd', 'ctrl', 'alt'}, 'I', self.adjustWindow(0, 0, 30, 14))
   -- bottom wide
-  bind({"ctrl", "alt"}, "K", self.adjustWindow(0, 6, 30, 14))
+  bind({'cmd', 'ctrl', 'alt'}, 'K', self.adjustWindow(0, 6, 30, 14))
 
   -- top left quarter
-  bind({"cmd", "ctrl", "shift"}, "J", self.adjustWindow(0, 0, 15, 10))
+  bind({'cmd', 'ctrl', 'shift'}, 'J', self.adjustWindow(0, 0, 15, 10))
   -- top right quarter
-  bind({"cmd", "ctrl", "shift"}, "I", self.adjustWindow(15, 0, 15, 10))
+  bind({'cmd', 'ctrl', 'shift'}, 'I', self.adjustWindow(15, 0, 15, 10))
   -- bottom right quarter
-  bind({"cmd", "ctrl", "shift"}, "L", self.adjustWindow(15, 10, 15, 10))
+  bind({'cmd', 'ctrl', 'shift'}, 'L', self.adjustWindow(15, 10, 15, 10))
   -- bottom left quarter
-  bind({"cmd", "ctrl", "shift"}, "K", self.adjustWindow(0, 10, 15, 10))
+  bind({'cmd', 'ctrl', 'shift'}, 'K', self.adjustWindow(0, 10, 15, 10))
 
   -- center super narrow
-  bind({"cmd", "ctrl", "alt"}, "\\", self.adjustWindow(10, 0, 10, 20))
+  bind({'cmd', 'ctrl', 'alt'}, '\\', self.adjustWindow(10, 0, 10, 20))
   -- center narrow small
-  bind({"ctrl", "alt"}, "\\", self.adjustWindow(9, 0, 12, 20))
+  bind({'ctrl', 'alt'}, '\\', self.adjustWindow(9, 0, 12, 20))
   -- center narrow
-  bind({"cmd", "ctrl"}, "\\", self.adjustWindow(7, 0, 16, 20))
+  bind({'cmd', 'ctrl'}, '\\', self.adjustWindow(7, 0, 16, 20))
 
   -- center medium small
-  bind({"ctrl", "alt"}, "'", self.adjustWindow(6, 0, 18, 20))
+  bind({'ctrl', 'alt'}, '\'', self.adjustWindow(6, 0, 18, 20))
   -- center medium
-  bind({"cmd", "ctrl"}, "'", self.adjustWindow(5, 0, 20, 20))
+  bind({'cmd', 'ctrl'}, '\'', self.adjustWindow(5, 0, 20, 20))
 
   -- center wide small
-  bind({"ctrl", "alt"}, ";", self.adjustWindow(4, 0, 22, 20))
+  bind({'ctrl', 'alt'}, ';', self.adjustWindow(4, 0, 22, 20))
   -- center wide
-  bind({"cmd", "ctrl"}, ";", self.adjustWindow(3, 0, 24, 20))
+  bind({'cmd', 'ctrl'}, ';', self.adjustWindow(3, 0, 24, 20))
 
   -- maximized
-  bind({"cmd", "ctrl"}, "H", self.grid.maximizeWindow)
+  bind({'cmd', 'ctrl'}, 'H', self.grid.maximizeWindow)
 
 
   --
@@ -98,7 +98,7 @@ function wm:init ()
   --
 
   -- move to screen to the left
-  bind({"cmd", "ctrl"}, ",",
+  bind({'cmd', 'ctrl'}, ',',
     function()
       local win = hs.window.focusedWindow()
       win:moveOneScreenWest()
@@ -107,7 +107,7 @@ function wm:init ()
   )
 
   -- move to screen to the right
-  bind({"cmd", "ctrl"}, ".",
+  bind({'cmd', 'ctrl'}, '.',
     function()
       local win = hs.window.focusedWindow()
       win:moveOneScreenEast()
@@ -116,7 +116,7 @@ function wm:init ()
   )
 
   -- move to screen above
-  bind({"cmd", "ctrl"}, "P",
+  bind({'cmd', 'ctrl'}, 'P',
     function()
       local win = hs.window.focusedWindow()
       win:moveOneScreenNorth()
@@ -125,7 +125,7 @@ function wm:init ()
   )
 
   -- move to screen bellow
-  bind({"cmd", "ctrl"}, "N",
+  bind({'cmd', 'ctrl'}, 'N',
     function()
       local win = hs.window.focusedWindow()
       win:moveOneScreenSouth()
@@ -140,9 +140,9 @@ end
 --
 
 wm.adjustWindow = function (x, y, w, h)
-  return function()
+  return function ()
     wm.grid.adjustWindow(
-      function(cell)
+      function (cell)
         cell.x = x
         cell.y = y
         cell.w = w