remove extra bracket

Author: Allynixtor

data/1511-revision-practical/billys_books.mdx

@@ -7,7 +7,7 @@ difficulty: Medium
 
 For this exercise, you’ll be working with the following scenario.
 
-Everyday Billy places a book on his floor, with each book being stacked on top of the previous book. On every third day, in addition to stacking a book to the top, Billy also places another book on top of his bookstack (after placing the new book). If there are an odd number of books, then Billy will move the book in the middle of his bookstack to the top. If there an even number of books, then Billy will take the book at the bottom of his bookstack, and move that to the top. He continues this for all N books.
+Everyday Billy places a book on his floor, with each book being stacked on top of the previous book. On every third day, in addition to stacking a book to the top, Billy also places another book on top of his bookstack (after placing the new book). If there are an odd number of books, then Billy will move the book in the middle of his bookstack to the top. If there an even number of books, then Billy will take the book at the bottom of his bookstack, and move that to the top. He continues this for all `n` books.
 
 Write a program `billys_books.c` which scans two lines of input:
 
@@ -59,4 +59,4 @@ $ 1511 autotest billys_books
 
 ## Solution
 
-You can view the solution code to this problem [here](https://github.com/csesoc/comp1511-revision-t1-2022/blob/master/solutions/billys-books/solution.c)).
+You can view the solution code to this problem [here](https://github.com/csesoc/comp1511-revision-t1-2022/blob/master/solutions/billys-books/solution.c).