With improved unit tests to test machavellian (sic) patterns

common/lib/xmodule/xmodule/js/spec/problem/edit_spec.coffee

@@ -10,8 +10,11 @@ describe 'MarkdownEditingDescriptor', ->
     it 'recognizes x as a selection if there is non-whitespace after x', ->
       revisedSelection = MarkdownEditingDescriptor.insertMultipleChoice('a\nx b\nc\nx \nd\n x e')
       expect(revisedSelection).toEqual('( ) a\n(x) b\n( ) c\n( ) x \n( ) d\n(x) e\n')
-    it 'removes multiple newlines', ->
-      revisedSelection = MarkdownEditingDescriptor.insertMultipleChoice('a\nx b\n\n\nc')
+    it 'recognizes x as a selection if it is first non whitespace and has whitespace with other non-whitespace', ->
+      revisedSelection = MarkdownEditingDescriptor.insertMultipleChoice(' x correct\n x \nex post facto\nb x c\nx c')
+      expect(revisedSelection).toEqual('(x) correct\n( )  x \n( ) ex post facto\n( ) b x c\n(x) c\n')
+    it 'removes multiple newlines but not last one', ->
+      revisedSelection = MarkdownEditingDescriptor.insertMultipleChoice('a\nx b\n\n\nc\n')
       expect(revisedSelection).toEqual('( ) a\n(x) b\n( ) c\n')
 
   describe 'insertCheckboxChoice', ->