Remove whitespaces in empty lines

gtk-3.0/apps/granite-widgets.css

@@ -131,7 +131,7 @@
 
 .content-view .help_button * {
     color: @theme_text_color;
-}   
+}
 
 .content-view .toolbar {
     -GtkWidget-window-dragging: true;
@@ -655,7 +655,7 @@ BirdieWidgetsTweetList * {
 }
 
 .composited-indicator,
-.wingpanel-app-button, 
+.wingpanel-app-button,
 .wingpanel-indicator-button {
     padding: 0 2px;
     background-color: transparent;

gtk-3.0/apps/lightdm-gtk-greeter.css

@@ -114,7 +114,7 @@
     background-color: shade(@lightdm_bg_color, 0.9);
     background-image: none;
     color: @lightdm_fg_color;
-                                      
+
     box-shadow: none;
     transition: all 150ms ease-out;
 }

gtk-3.0/gtk-widgets.css

@@ -43,7 +43,7 @@
     -WnckTasklist-fade-overlay-rect: 0;
 
     background-clip: padding-box;
-    
+
     outline-color: alpha(@theme_selected_bg_color, 0.5);
     outline-style: solid;
     outline-offset: 0;
@@ -1651,7 +1651,6 @@ GtkComboBox .separator {
     -GtkWidget-vertical-separator: 0;
 
     border-style: none;
-
 }
 
 /***********