replace tabs with spaces, refs #9991

lib/base_state.dart

@@ -85,12 +85,12 @@ abstract class BaseState<T> extends State<T> {
   }
 
   getPaddingForTextWidget() {
-  	const double verticalPadding = 12.0;
+    const double verticalPadding = 12.0;
     const double horizontalPadding = 16.0;
-  	return new EdgeInsets.only(top: verticalPadding,
-  		bottom: verticalPadding,
-  		left: horizontalPadding,
-  		right: horizontalPadding);
+    return new EdgeInsets.only(top: verticalPadding,
+      bottom: verticalPadding,
+      left: horizontalPadding,
+      right: horizontalPadding);
   }
 
   /// Метод возвращает BoxDecoration для _getDecoratedInputField
@@ -105,8 +105,8 @@ abstract class BaseState<T> extends State<T> {
   }
 
   Widget getTextWidget() {
-  	return new TextField(keyboardType: TextInputType.number,
-  	 decoration: new InputDecoration.collapsed(hintText: getHint(),
+    return new TextField(keyboardType: TextInputType.number,
+     decoration: new InputDecoration.collapsed(hintText: getHint(),
       hintStyle: new TextStyle(color: greyTextColor, fontSize: 16.0)),
       onChanged: (text) => handleUserInput(text));
   }