pin LTI scores to 2 decimal places

lms/djangoapps/courseware/features/lti.feature

@@ -92,7 +92,7 @@ Feature: LMS.LTI component
   And I see in the gradebook table that "HW" is "80"
   And I see in the gradebook table that "Total" is "8"
   And I visit the LTI component
-  Then I see LTI component progress with text "(8.0 / 10.0 points)"
+  Then I see LTI component progress with text "(8.00 / 10.00 points)"
   Then I see LTI component feedback with text "This is awesome."
 
   #10
@@ -103,11 +103,11 @@ Feature: LMS.LTI component
   | False              | 10     | True      | True      |
   And I submit answer to LTI 2 question
   And I visit the LTI component
-  Then I see LTI component progress with text "(8.0 / 10.0 points)"
+  Then I see LTI component progress with text "(8.00 / 10.00 points)"
   Then I see LTI component feedback with text "This is awesome."
   And the LTI provider deletes my grade and feedback
   And I visit the LTI component (have to reload)
-  Then I see LTI component progress with text "(10.0 points possible)"
+  Then I see LTI component progress with text "(10.00 points possible)"
   Then in the LTI component I do not see feedback
   And I click on the "Progress" tab
   Then I see text "Problem Scores: 0/10"

lms/templates/lti.html

@@ -10,10 +10,10 @@
     <div class="problem-progress">
         % if module_score is not None:
             ## Translators: "points" is the student's achieved score on this LTI unit, and "total_points" is the maximum number of points achievable.
-            (${_("{points} / {total_points} points").format(points=module_score, total_points=weight)})
+            (${_("{points} / {total_points} points").format(points="{:0.2f}".format(module_score), total_points="{:0.2f}".format(weight))})
         % else:
             ## Translators: "total_points" is the maximum number of points achievable on this LTI unit
-            (${_("{total_points} points possible").format(total_points=weight)})
+            (${_("{total_points} points possible").format(total_points="{:0.2f}".format(weight))})
         % endif
     </div>
 % endif