Fixed tab issue (tabs are now correctly spaces)

cms/djangoapps/contentstore/features/studio-overview-togglesection.feature

 Feature: Overview Toggle Section
-	In order to quickly view the details of a course's section or to scan the inventory of sections
+    In order to quickly view the details of a course's section or to scan the inventory of sections
     As a course author
     I want to toggle the visibility of each section's  subsection details in the overview listing
 
-	Scenario: The default layout for the overview page is to show sections in expanded view
-		Given I have a course with multiple sections
+    Scenario: The default layout for the overview page is to show sections in expanded view
+        Given I have a course with multiple sections
         When I navigate to the course overview page
         Then I see the "Collapse All Sections" link
         And all sections are expanded
 
-	Scenario: Expand /collapse for a course with no sections
-		Given I have a course with no sections
+    Scenario: Expand /collapse for a course with no sections
+        Given I have a course with no sections
         When I navigate to the course overview page
         Then I do not see the "Collapse All Sections" link
 
-	Scenario: Collapse link appears after creating first section of a course
-		Given I have a course with no sections
+    Scenario: Collapse link appears after creating first section of a course
+        Given I have a course with no sections
         When I navigate to the course overview page
         And I add a section
         Then I see the "Collapse All Sections" link
         And all sections are expanded
 
-	Scenario: Collapse link is not removed after last section of a course is deleted
-		Given I have a course with 1 section
+    Scenario: Collapse link is not removed after last section of a course is deleted
+        Given I have a course with 1 section
         And I navigate to the course overview page
         When I confirm all alerts
         And I press the "section" delete icon
-		Then I see the "Collapse All Sections" link
-
-	Scenario: Collapsing all sections when all sections are expanded
-		Given I navigate to the courseware page of a course with multiple sections
-		And all sections are expanded
-		When I click the "Collapse All Sections" link
-		Then I see the "Expand All Sections" link
-		And all sections are collapsed
-
-	Scenario: Collapsing all sections when 1 or more sections are already collapsed
-		Given I navigate to the courseware page of a course with multiple sections
-		And all sections are expanded
-		When I collapse the first section
-		And I click the "Collapse All Sections" link
-		Then I see the "Expand All Sections" link
-		And all sections are collapsed
-
-	Scenario: Expanding all sections when all sections are collapsed
-		Given I navigate to the courseware page of a course with multiple sections
-		And I click the "Collapse All Sections" link
-		When I click the "Expand All Sections" link
-		Then I see the "Collapse All Sections" link
-		And all sections are expanded
-
-	Scenario: Expanding all sections when 1 or more sections are already expanded
-		Given I navigate to the courseware page of a course with multiple sections
-		And I click the "Collapse All Sections" link
-		When I expand the first section
-		And I click the "Expand All Sections" link
-		Then I see the "Collapse All Sections" link
-		And all sections are expanded
+        Then I see the "Collapse All Sections" link
+
+    Scenario: Collapsing all sections when all sections are expanded
+        Given I navigate to the courseware page of a course with multiple sections
+        And all sections are expanded
+        When I click the "Collapse All Sections" link
+        Then I see the "Expand All Sections" link
+        And all sections are collapsed
+
+    Scenario: Collapsing all sections when 1 or more sections are already collapsed
+        Given I navigate to the courseware page of a course with multiple sections
+        And all sections are expanded
+        When I collapse the first section
+        And I click the "Collapse All Sections" link
+        Then I see the "Expand All Sections" link
+        And all sections are collapsed
+
+    Scenario: Expanding all sections when all sections are collapsed
+        Given I navigate to the courseware page of a course with multiple sections
+        And I click the "Collapse All Sections" link
+        When I click the "Expand All Sections" link
+        Then I see the "Collapse All Sections" link
+        And all sections are expanded
+
+    Scenario: Expanding all sections when 1 or more sections are already expanded
+        Given I navigate to the courseware page of a course with multiple sections
+        And I click the "Collapse All Sections" link
+        When I expand the first section
+        And I click the "Expand All Sections" link
+        Then I see the "Collapse All Sections" link
+        And all sections are expanded