clean trailing whitespace in css examples

docs/examples/guide/css/nesting02.tcss

@@ -9,11 +9,11 @@
         padding: 1 2;
         margin: 1 2;
         text-align: center;
-        border: heavy $panel;    
+        border: heavy $panel;
 
         /* Style the Yes button */
         &.affirmative {
-            border: heavy $success;        
+            border: heavy $success;
         }
 
         /* Style the No button */

docs/examples/guide/reactivity/set_reactive01.py

@@ -49,7 +49,7 @@ class NameApp(App):
     CSS = """
     Screen {
         align: center middle;
-    }   
+    }
     """
     greeting_no: var[int] = var(0)
     BINDINGS = [("space", "greeting")]

docs/examples/guide/reactivity/set_reactive02.py

@@ -49,7 +49,7 @@ class NameApp(App):
     CSS = """
     Screen {
         align: center middle;
-    }   
+    }
     """
     greeting_no: var[int] = var(0)
     BINDINGS = [("space", "greeting")]

docs/examples/guide/screens/questions01.tcss

@@ -1,17 +1,17 @@
 QuestionScreen {
     layout: grid;
-    grid-size: 2 2;                
+    grid-size: 2 2;
     align: center bottom;
 }
 
 QuestionScreen > Label {
-    margin: 1;       
+    margin: 1;
     text-align: center;
-    column-span: 2;    
+    column-span: 2;
     width: 1fr;
 }
 
 QuestionScreen Button {
-    margin: 2; 
-    width: 1fr;     
+    margin: 2;
+    width: 1fr;
 }

docs/examples/styles/hatch.tcss

@@ -1,7 +1,7 @@
 .hatch {
     height: 1fr;
     border: solid $secondary;
-  
+
     &.cross {
         hatch: cross $success;
     }

docs/examples/styles/keyline.tcss

@@ -5,16 +5,16 @@ Grid {
     keyline: heavy green;
 }
 Placeholder {
-    height: 1fr;      
+    height: 1fr;
 }
 .hidden {
     visibility: hidden;
-} 
+}
 #foo {
     column-span: 2;
 }
 #bar {
-    row-span: 2;        
+    row-span: 2;
 }
 #baz {
     column-span:3;

examples/code_browser.tcss

@@ -23,7 +23,7 @@ CodeBrowser.-show-tree #tree-view {
 #code-view {
     overflow: auto scroll;
     min-width: 100%;
-    hatch: right $primary;   
+    hatch: right $primary;
 }
 #code {
     width: auto;

examples/dictionary.tcss

@@ -9,7 +9,7 @@ Input {
 
 #results {
     width: 100%;
-    height: auto;    
+    height: auto;
 }
 
 #results-container {

examples/merlin.py

@@ -49,8 +49,8 @@ class LabelSwitch(Widget):
     DEFAULT_CSS = """
     LabelSwitch Label {
         text-align: center;
-        width: 1fr;       
-        text-style: bold;         
+        width: 1fr;
+        text-style: bold;
     }
 
     LabelSwitch Label#label-5 {
@@ -101,7 +101,7 @@ class MerlinApp(App):
 
     CSS = """
     Screen {
-        align: center middle;   
+        align: center middle;
     }
 
     Screen.-win {
@@ -110,8 +110,8 @@ class MerlinApp(App):
 
     Screen.-win Timer {
         color: $success;
-    }    
-    
+    }
+
     Grid {
         width: auto;
         height: auto;