cleanup: expand tab to 4 spaces

frontend/ui/widget/closebutton.lua

@@ -11,35 +11,35 @@ local Font = require("ui/font")
 a button widget that shows an "×" and handles closing window when tapped
 --]]
 local CloseButton = InputContainer:new{
-	align = "right",
-	window = nil,
+    align = "right",
+    window = nil,
 }
 
 function CloseButton:init()
-	local text_widget = TextWidget:new{
-		text = "×",
-		face = Font:getFace("cfont", 32),
-	}
-	self[1] = FrameContainer:new{
-		bordersize = 0,
-		padding = 0,
-		text_widget
-	}
-	
-	self.dimen = text_widget:getSize():copy()
+    local text_widget = TextWidget:new{
+        text = "×",
+        face = Font:getFace("cfont", 32),
+    }
+    self[1] = FrameContainer:new{
+        bordersize = 0,
+        padding = 0,
+        text_widget
+    }
+    
+    self.dimen = text_widget:getSize():copy()
 
-	self.ges_events.Close = {
-		GestureRange:new{
-			ges = "tap",
-			range = self.dimen,
-		},
-		doc = "Tap on close button",
-	}
+    self.ges_events.Close = {
+        GestureRange:new{
+            ges = "tap",
+            range = self.dimen,
+        },
+        doc = "Tap on close button",
+    }
 end
 
 function CloseButton:onClose()
-	self.window:onClose()
-	return true
+    self.window:onClose()
+    return true
 end
 
 return CloseButton