Remove whitespace from indented bullet point lines

Author: Elahi Concha

exercises/grade-school/description.md

@@ -14,8 +14,8 @@ In the end, you should be able to:
   Grades should be sorted as 1, 2, 3, etc., and students within a grade should be sorted alphabetically by name.
   - "Who is enrolled in school right now?"
   - "Let me think.
-     We have Anna, Barb, and Charlie in grade 1, Alex, Peter, and Zoe in grade 2, and Jim in grade 5.
-     So the answer is: Anna, Barb, Charlie, Alex, Peter, Zoe, and Jim."
+    We have Anna, Barb, and Charlie in grade 1, Alex, Peter, and Zoe in grade 2, and Jim in grade 5.
+    So the answer is: Anna, Barb, Charlie, Alex, Peter, Zoe, and Jim."
 
 Note that all our students only have one name (it’s a small town, what do you want?), and each student cannot be added more than once to a grade or the roster.
 If a test attempts to add the same student more than once, your implementation should indicate that this is incorrect.