iris: give alignment examples full width

examples/text/lib.rs

@@ -49,9 +49,13 @@ where
         .width(rest(1));
 
     let aligned = (
-        wtext("Left aligned").text_align(Align::CENTER_LEFT),
-        wtext("Centered").text_align(Align::CENTER),
-        wtext("Right aligned").text_align(Align::CENTER_RIGHT),
+        wtext("Left aligned")
+            .text_align(Align::CENTER_LEFT)
+            .width(rest(1)),
+        wtext("Centered").text_align(Align::CENTER).width(rest(1)),
+        wtext("Right aligned")
+            .text_align(Align::CENTER_RIGHT)
+            .width(rest(1)),
     )
         .span(Dir::DOWN)
         .gap(dp(4))