Don't set the display in the box-flex mixin. This makes nested flex boxes annoying. Closes GH-207

frameworks/compass/stylesheets/compass/css3/_box.scss

@@ -45,7 +45,6 @@ $default-box-flex: 0 !default;
   @include experimental(box-flex, $flex,
     -moz, -webkit, not -o, not -ms, not -khtml, official
   );
-  display: block;
 }
 
 // Default flex group

test/fixtures/stylesheets/compass/css/box.css

@@ -12,8 +12,7 @@
   .hbox > * {
     -moz-box-flex: 0;
     -webkit-box-flex: 0;
-    box-flex: 0;
-    display: block; }
+    box-flex: 0; }
 
 .vbox {
   display: -moz-box;
@@ -28,14 +27,12 @@
   .vbox > * {
     -moz-box-flex: 0;
     -webkit-box-flex: 0;
-    box-flex: 0;
-    display: block; }
+    box-flex: 0; }
 
 .spacer {
   -moz-box-flex: 1;
   -webkit-box-flex: 1;
-  box-flex: 1;
-  display: block; }
+  box-flex: 1; }
 
 .reverse {
   -moz-box-direction: reverse;
@@ -45,20 +42,17 @@
 .box-flex-0 {
   -moz-box-flex: 0;
   -webkit-box-flex: 0;
-  box-flex: 0;
-  display: block; }
+  box-flex: 0; }
 
 .box-flex-1 {
   -moz-box-flex: 1;
   -webkit-box-flex: 1;
-  box-flex: 1;
-  display: block; }
+  box-flex: 1; }
 
 .box-flex-2 {
   -moz-box-flex: 2;
   -webkit-box-flex: 2;
-  box-flex: 2;
-  display: block; }
+  box-flex: 2; }
 
 .box-flex-group-0 {
   -moz-box-flex-group: 0;