Address review comments (i18n).

tests/integration/test_vectordraw.py

@@ -114,7 +114,7 @@ class TestVectorDraw(StudioEditableBaseTest):
         actions = self.exercise.find_element_by_css_selector(".action")
         self.assertTrue(actions.is_displayed())
         check = actions.find_element_by_css_selector(".check")
-        self.assertEquals(check.text, "CHECK YOUR ANSWER")
+        self.assertEquals(check.text, "CHECK")
 
     def check_dropdown(self, controls, vectors=[], points=[]):
         dropdown = controls.find_element_by_css_selector("select")

vectordraw/public/css/vectordraw.css

@@ -100,6 +100,21 @@
     text-transform: uppercase;
 }
 
+/* Make sure screen-reader content is hidden in the workbench: */
+.vectordraw_block .action .sr {
+    display: none;
+    border: 0;
+    clip: rect(0 0 0 0);
+    height: 1px;
+    margin: -1px;
+    overflow: hidden;
+    padding: 0;
+    position: absolute;
+    width: 1px;
+    background: #ffffff;
+    color: #000000;
+}
+
 .vectordraw_block .vectordraw-status {
     display: inline-block;
     width: 100%;

vectordraw/templates/html/vectordraw.html

@@ -61,8 +61,8 @@
 
   <div class="action">
     <button class="check">
-      <span class="check-label">{% trans "Check" %}</span>
-      <span class="sr"> {% trans "your answer" %}</span>
+      <span class="check-label" aria-hidden="true">{% trans "Check" %}</span>
+      <span class="sr"> {% trans "Check your answer" %}</span>
     </button>
   </div>