Added failing test for #730

src/test.html

@@ -352,6 +352,45 @@ relative_path: ../
     </div>
   </div>
 
+  <h3>Button groups<small>should be same height</small></h3>
+  <div class="row">
+    <div class="span4">
+      <div style="border: solid 1px #d3d3d3;">
+        <div class="btn-group">
+            <button class="btn btn-large">
+                <i class="icon-adjust"></i>
+            </button>
+            <button class="btn btn-large">
+                Text
+            </button>
+        </div>
+      </div>
+    </div>
+    <div class="span4">
+      <div style="border: solid 1px #d3d3d3;">
+        <div class="btn-group">
+            <button class="btn">
+                <i class="icon-adjust"></i>
+            </button>
+            <button class="btn">
+                Text
+            </button>
+        </div>
+      </div>
+    </div>
+    <div class="span4">
+      <div style="border: solid 1px #d3d3d3;">
+        <div class="btn-group">
+            <button class="btn btn-small">
+                <i class="icon-adjust"></i>
+            </button>
+            <button class="btn btn-small">
+                Text
+            </button>
+        </div>
+      </div>
+    </div>
+  </div>
 
   <h3>Buttons with pulled 2x, 3x, 4x <small>should be same height, have correct line height</small></h3>
   <div class="row">